64587791 has 2 divisors, whose sum is σ = 64587792. Its totient is φ = 64587790.

The previous prime is 64587779. The next prime is 64587797. The reversal of 64587791 is 19778546.

64587791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64587791 - 2¹⁴ = 64571407 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64587797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32293895 + 32293896.

It is an arithmetic number, because the mean of its divisors is an integer number (32293896).

Almost surely, 2^64587791 is an apocalyptic number.

64587791 is a deficient number, since it is larger than the sum of its proper divisors (1).

64587791 is an equidigital number, since it uses as much as digits as its factorization.

64587791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 47.

The square root of 64587791 is about 8036.6529724755. The cubic root of 64587791 is about 401.2208346991.

The spelling of 64587791 in words is "sixty-four million, five hundred eighty-seven thousand, seven hundred ninety-one".