64877387 has 2 divisors, whose sum is σ = 64877388. Its totient is φ = 64877386.

The previous prime is 64877377. The next prime is 64877401. The reversal of 64877387 is 78377846.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64877387 is a prime.

It is not a weakly prime, because it can be changed into another prime (64877377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32438693 + 32438694.

It is an arithmetic number, because the mean of its divisors is an integer number (32438694).

Almost surely, 2^64877387 is an apocalyptic number.

64877387 is a deficient number, since it is larger than the sum of its proper divisors (1).

64877387 is an equidigital number, since it uses as much as digits as its factorization.

64877387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544, while the sum is 50.

The square root of 64877387 is about 8054.6500234337. The cubic root of 64877387 is about 401.8195996747.

The spelling of 64877387 in words is "sixty-four million, eight hundred seventy-seven thousand, three hundred eighty-seven".