64854931 has 2 divisors, whose sum is σ = 64854932. Its totient is φ = 64854930.

The previous prime is 64854901. The next prime is 64854967. The reversal of 64854931 is 13945846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64854931 - 2⁵ = 64854899 is a prime.

It is a super-2 number, since 2×64854931² = 8412324150029522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64854901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32427465 + 32427466.

It is an arithmetic number, because the mean of its divisors is an integer number (32427466).

Almost surely, 2^64854931 is an apocalyptic number.

64854931 is a deficient number, since it is larger than the sum of its proper divisors (1).

64854931 is an equidigital number, since it uses as much as digits as its factorization.

64854931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 64854931 is about 8053.2559254006. The cubic root of 64854931 is about 401.7732337393.

The spelling of 64854931 in words is "sixty-four million, eight hundred fifty-four thousand, nine hundred thirty-one".