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290424961 = 1731678757
BaseRepresentation
bin10001010011111…
…000100010000001
3202020111010011001
4101103320202001
51043322044321
644452452001
710124400001
oct2123704201
9666433131
10290424961
11139a34632
128131a001
13482277b8
142a800001
151a76bc91
hex114f8881

290424961 has 4 divisors (see below), whose sum is σ = 292103892. Its totient is φ = 288746032.

The previous prime is 290424949. The next prime is 290425007. The reversal of 290424961 is 169424092.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178382736 + 112042225 = 13356^2 + 10585^2 .

It is a cyclic number.

It is not a de Polignac number, because 290424961 - 213 = 290416769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 290424961.

It is not an unprimeable number, because it can be changed into a prime (290424931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839206 + ... + 839551.

It is an arithmetic number, because the mean of its divisors is an integer number (73025973).

Almost surely, 2290424961 is an apocalyptic number.

It is an amenable number.

290424961 is a deficient number, since it is larger than the sum of its proper divisors (1678931).

290424961 is a wasteful number, since it uses less digits than its factorization.

290424961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678930.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 290424961 is about 17041.8590828583. The cubic root of 290424961 is about 662.2337544609.

The spelling of 290424961 in words is "two hundred ninety million, four hundred twenty-four thousand, nine hundred sixty-one".

Divisors: 1 173 1678757 290424961