431340637 has 16 divisors (see below), whose sum is σ = 531401472. Its totient is φ = 340945920.

The previous prime is 431340607. The next prime is 431340661. The reversal of 431340637 is 736043134.

It is not a de Polignac number, because 431340637 - 2⁷ = 431340509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 431340599 and 431340608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431340607) 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, 135933 + ... + 139069.

It is an arithmetic number, because the mean of its divisors is an integer number (33212592).

Almost surely, 2^431340637 is an apocalyptic number.

It is an amenable number.

431340637 is a deficient number, since it is larger than the sum of its proper divisors (100060835).

431340637 is a wasteful number, since it uses less digits than its factorization.

431340637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4668.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 431340637 is about 20768.7418251564. The cubic root of 431340637 is about 755.5678297803.

The spelling of 431340637 in words is "four hundred thirty-one million, three hundred forty thousand, six hundred thirty-seven".