64860431 has 2 divisors, whose sum is σ = 64860432. Its totient is φ = 64860430.

The previous prime is 64860421. The next prime is 64860449. The reversal of 64860431 is 13406846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64860431 - 2¹⁴ = 64844047 is a prime.

It is a super-2 number, since 2×64860431² = 8413751019011522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64860421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32430215 + 32430216.

It is an arithmetic number, because the mean of its divisors is an integer number (32430216).

Almost surely, 2^64860431 is an apocalyptic number.

64860431 is a deficient number, since it is larger than the sum of its proper divisors (1).

64860431 is an equidigital number, since it uses as much as digits as its factorization.

64860431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 64860431 is about 8053.5973949534. The cubic root of 64860431 is about 401.7845908316.

The spelling of 64860431 in words is "sixty-four million, eight hundred sixty thousand, four hundred thirty-one".