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9442981 = 19496999
BaseRepresentation
bin100100000001…
…011010100101
3122202202100001
4210001122211
54404133411
6534221301
7143156362
oct44013245
918682301
109442981
11536a719
1231b4831
131c58182
14137b469
15c67dc1
hex9016a5

9442981 has 4 divisors (see below), whose sum is σ = 9940000. Its totient is φ = 8945964.

The previous prime is 9442969. The next prime is 9443011. The reversal of 9442981 is 1892449.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9442981 - 29 = 9442469 is a prime.

It is a super-2 number, since 2×94429812 = 178339780332722, which contains 22 as substring.

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 9442981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9442921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248481 + ... + 248518.

It is an arithmetic number, because the mean of its divisors is an integer number (2485000).

Almost surely, 29442981 is an apocalyptic number.

9442981 is the 1944-th centered pentagonal number.

It is an amenable number.

9442981 is a deficient number, since it is larger than the sum of its proper divisors (497019).

9442981 is a wasteful number, since it uses less digits than its factorization.

9442981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497018.

The product of its digits is 20736, while the sum is 37.

The square root of 9442981 is about 3072.9433772850. The cubic root of 9442981 is about 211.3666050925.

The spelling of 9442981 in words is "nine million, four hundred forty-two thousand, nine hundred eighty-one".

Divisors: 1 19 496999 9442981