64592881 has 2 divisors, whose sum is σ = 64592882. Its totient is φ = 64592880.

The previous prime is 64592873. The next prime is 64592887. The reversal of 64592881 is 18829546.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57623281 + 6969600 = 7591^2 + 2640^2 .

It is a cyclic number.

It is not a de Polignac number, because 64592881 - 2³ = 64592873 is a prime.

It is a super-2 number, since 2×64592881² = 8344480551760322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64592887) 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, 32296440 + 32296441.

It is an arithmetic number, because the mean of its divisors is an integer number (32296441).

Almost surely, 2^64592881 is an apocalyptic number.

It is an amenable number.

64592881 is a deficient number, since it is larger than the sum of its proper divisors (1).

64592881 is an equidigital number, since it uses as much as digits as its factorization.

64592881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 43.

The square root of 64592881 is about 8036.9696403557. The cubic root of 64592881 is about 401.2313741544.

The spelling of 64592881 in words is "sixty-four million, five hundred ninety-two thousand, eight hundred eighty-one".