431897987257 has 8 divisors (see below), whose sum is σ = 491646720960. Its totient is φ = 375563466960.

The previous prime is 431897987249. The next prime is 431897987267. The reversal of 431897987257 is 752789798134.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 431897987257 - 2³ = 431897987249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431897987267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853553082 + ... + 853553587.

It is an arithmetic number, because the mean of its divisors is an integer number (61455840120).

Almost surely, 2^431897987257 is an apocalyptic number.

It is an amenable number.

431897987257 is a deficient number, since it is larger than the sum of its proper divisors (59748733703).

431897987257 is a wasteful number, since it uses less digits than its factorization.

431897987257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707106703.

The product of its digits is 213373440, while the sum is 70.

The spelling of 431897987257 in words is "four hundred thirty-one billion, eight hundred ninety-seven million, nine hundred eighty-seven thousand, two hundred fifty-seven".