64937791 has 2 divisors, whose sum is σ = 64937792. Its totient is φ = 64937790.

The previous prime is 64937779. The next prime is 64937827. The reversal of 64937791 is 19773946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64937791 - 2¹¹ = 64935743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64937771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32468895 + 32468896.

It is an arithmetic number, because the mean of its divisors is an integer number (32468896).

Almost surely, 2^64937791 is an apocalyptic number.

64937791 is a deficient number, since it is larger than the sum of its proper divisors (1).

64937791 is an equidigital number, since it uses as much as digits as its factorization.

64937791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 46.

The square root of 64937791 is about 8058.3987863595. The cubic root of 64937791 is about 401.9442655172.

The spelling of 64937791 in words is "sixty-four million, nine hundred thirty-seven thousand, seven hundred ninety-one".