64987067 has 4 divisors (see below), whose sum is σ = 67083456. Its totient is φ = 62890680.

The previous prime is 64987051. The next prime is 64987079. The reversal of 64987067 is 76078946.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64987067 - 2⁴ = 64987051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64987567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1048148 + ... + 1048209.

It is an arithmetic number, because the mean of its divisors is an integer number (16770864).

Almost surely, 2^64987067 is an apocalyptic number.

64987067 is a deficient number, since it is larger than the sum of its proper divisors (2096389).

64987067 is a wasteful number, since it uses less digits than its factorization.

64987067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096388.

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

The square root of 64987067 is about 8061.4556377865. The cubic root of 64987067 is about 402.0459073997.

The spelling of 64987067 in words is "sixty-four million, nine hundred eighty-seven thousand, sixty-seven".