64612687 has 4 divisors (see below), whose sum is σ = 64722240. Its totient is φ = 64503136.

The previous prime is 64612663. The next prime is 64612697. The reversal of 64612687 is 78621646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78621646 = 2 ⋅39310823.

It is a cyclic number.

It is not a de Polignac number, because 64612687 - 2¹⁵ = 64579919 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 (64612657) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53887 + ... + 55072.

It is an arithmetic number, because the mean of its divisors is an integer number (16180560).

Almost surely, 2^64612687 is an apocalyptic number.

64612687 is a deficient number, since it is larger than the sum of its proper divisors (109553).

64612687 is a wasteful number, since it uses less digits than its factorization.

64612687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109552.

The product of its digits is 96768, while the sum is 40.

The square root of 64612687 is about 8038.2017267546. The cubic root of 64612687 is about 401.2723795840.

The spelling of 64612687 in words is "sixty-four million, six hundred twelve thousand, six hundred eighty-seven".