404697431 has 4 divisors (see below), whose sum is σ = 404764752. Its totient is φ = 404630112.

The previous prime is 404697413. The next prime is 404697437. The reversal of 404697431 is 134796404.

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

It is a cyclic number.

It is not a de Polignac number, because 404697431 - 2¹⁴ = 404681047 is a prime.

It is a super-2 number, since 2×404697431² = 327560021315999522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404697437) 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, 23651 + ... + 36996.

It is an arithmetic number, because the mean of its divisors is an integer number (101191188).

Almost surely, 2^404697431 is an apocalyptic number.

404697431 is a deficient number, since it is larger than the sum of its proper divisors (67321).

404697431 is an equidigital number, since it uses as much as digits as its factorization.

404697431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67320.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 404697431 is about 20117.0930057004. The cubic root of 404697431 is about 739.6793296515.

The spelling of 404697431 in words is "four hundred four million, six hundred ninety-seven thousand, four hundred thirty-one".