431936813 has 32 divisors (see below), whose sum is σ = 552960000. Its totient is φ = 334466160.

The previous prime is 431936789. The next prime is 431936819. The reversal of 431936813 is 318639134.

It is a happy number.

It is not a de Polignac number, because 431936813 - 2²² = 427742509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431936819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 901508 + ... + 901986.

It is an arithmetic number, because the mean of its divisors is an integer number (17280000).

Almost surely, 2^431936813 is an apocalyptic number.

It is an amenable number.

431936813 is a deficient number, since it is larger than the sum of its proper divisors (121023187).

431936813 is a wasteful number, since it uses less digits than its factorization.

431936813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 736 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 431936813 is about 20783.0895922623. The cubic root of 431936813 is about 755.9157713660.

The spelling of 431936813 in words is "four hundred thirty-one million, nine hundred thirty-six thousand, eight hundred thirteen".