431639457 has 16 divisors (see below), whose sum is σ = 586872000. Its totient is φ = 282110144.

The previous prime is 431639449. The next prime is 431639471. The reversal of 431639457 is 754936134.

It is a cyclic number.

It is not a de Polignac number, because 431639457 - 2³ = 431639449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (431639057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65719 + ... + 71987.

It is an arithmetic number, because the mean of its divisors is an integer number (36679500).

Almost surely, 2^431639457 is an apocalyptic number.

It is an amenable number.

431639457 is a deficient number, since it is larger than the sum of its proper divisors (155232543).

431639457 is a wasteful number, since it uses less digits than its factorization.

431639457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6720.

The product of its digits is 272160, while the sum is 42.

The square root of 431639457 is about 20775.9345638169. The cubic root of 431639457 is about 755.7422678322.

The spelling of 431639457 in words is "four hundred thirty-one million, six hundred thirty-nine thousand, four hundred fifty-seven".