64992087 has 12 divisors (see below), whose sum is σ = 94095144. Its totient is φ = 43227600.

The previous prime is 64992079. The next prime is 64992101. The reversal of 64992087 is 78029946.

It is a happy number.

It is not a de Polignac number, because 64992087 - 2³ = 64992079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64992287) 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 11 ways as a sum of consecutive naturals, for example, 4164 + ... + 12137.

It is an arithmetic number, because the mean of its divisors is an integer number (7841262).

Almost surely, 2^64992087 is an apocalyptic number.

64992087 is a deficient number, since it is larger than the sum of its proper divisors (29103057).

64992087 is a wasteful number, since it uses less digits than its factorization.

64992087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16750 (or 16747 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 64992087 is about 8061.7669899347. The cubic root of 64992087 is about 402.0562592978.

The spelling of 64992087 in words is "sixty-four million, nine hundred ninety-two thousand, eighty-seven".