64697087 has 24 divisors (see below), whose sum is σ = 84800736. Its totient is φ = 48162816.

The previous prime is 64697077. The next prime is 64697107. The reversal of 64697087 is 78079646.

It is a happy number.

It is not a de Polignac number, because 64697087 - 2⁶ = 64697023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64697077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18503 + ... + 21719.

It is an arithmetic number, because the mean of its divisors is an integer number (3533364).

Almost surely, 2^64697087 is an apocalyptic number.

64697087 is a deficient number, since it is larger than the sum of its proper divisors (20103649).

64697087 is a wasteful number, since it uses less digits than its factorization.

64697087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267 (or 3254 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 64697087 is about 8043.4499438985. The cubic root of 64697087 is about 401.4470235780.

The spelling of 64697087 in words is "sixty-four million, six hundred ninety-seven thousand, eighty-seven".