64970987 has 2 divisors, whose sum is σ = 64970988. Its totient is φ = 64970986.

The previous prime is 64970953. The next prime is 64970993. The reversal of 64970987 is 78907946.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64970987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64975987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32485493 + 32485494.

It is an arithmetic number, because the mean of its divisors is an integer number (32485494).

Almost surely, 2^64970987 is an apocalyptic number.

64970987 is a deficient number, since it is larger than the sum of its proper divisors (1).

64970987 is an equidigital number, since it uses as much as digits as its factorization.

64970987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 64970987 is about 8060.4582375942. The cubic root of 64970987 is about 402.0127447425.

The spelling of 64970987 in words is "sixty-four million, nine hundred seventy thousand, nine hundred eighty-seven".