64204687 has 2 divisors, whose sum is σ = 64204688. Its totient is φ = 64204686.

The previous prime is 64204669. The next prime is 64204709. The reversal of 64204687 is 78640246.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64204687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64204187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32102343 + 32102344.

It is an arithmetic number, because the mean of its divisors is an integer number (32102344).

Almost surely, 2^64204687 is an apocalyptic number.

64204687 is a deficient number, since it is larger than the sum of its proper divisors (1).

64204687 is an equidigital number, since it uses as much as digits as its factorization.

64204687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 64204687 is about 8012.7827251212. The cubic root of 64204687 is about 400.4259774470.

The spelling of 64204687 in words is "sixty-four million, two hundred four thousand, six hundred eighty-seven".