64738831 has 2 divisors, whose sum is σ = 64738832. Its totient is φ = 64738830.

The previous prime is 64738801. The next prime is 64738847. The reversal of 64738831 is 13883746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64738831 - 2⁵ = 64738799 is a prime.

It is a super-2 number, since 2×64738831² = 8382232478493122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64738801) 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, 32369415 + 32369416.

It is an arithmetic number, because the mean of its divisors is an integer number (32369416).

Almost surely, 2^64738831 is an apocalyptic number.

64738831 is a deficient number, since it is larger than the sum of its proper divisors (1).

64738831 is an equidigital number, since it uses as much as digits as its factorization.

64738831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 64738831 is about 8046.0444318932. The cubic root of 64738831 is about 401.5333458655.

The spelling of 64738831 in words is "sixty-four million, seven hundred thirty-eight thousand, eight hundred thirty-one".