290406197 has 4 divisors (see below), whose sum is σ = 292256076. Its totient is φ = 288556320.

The previous prime is 290406173. The next prime is 290406269. The reversal of 290406197 is 791604092.

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 221831236 + 68574961 = 14894^2 + 8281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-290406197 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 290406197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290406107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924704 + ... + 925017.

It is an arithmetic number, because the mean of its divisors is an integer number (73064019).

Almost surely, 2^290406197 is an apocalyptic number.

It is an amenable number.

290406197 is a deficient number, since it is larger than the sum of its proper divisors (1849879).

290406197 is a wasteful number, since it uses less digits than its factorization.

290406197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849878.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 290406197 is about 17041.3085471744. The cubic root of 290406197 is about 662.2194921173.

The spelling of 290406197 in words is "two hundred ninety million, four hundred six thousand, one hundred ninety-seven".