72886687 has 4 divisors (see below), whose sum is σ = 73974616. Its totient is φ = 71798760.

The previous prime is 72886661. The next prime is 72886703. The reversal of 72886687 is 78668827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78668827 = 2719 ⋅28933.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72886687 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 (72886087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543864 + ... + 543997.

It is an arithmetic number, because the mean of its divisors is an integer number (18493654).

Almost surely, 2^72886687 is an apocalyptic number.

72886687 is a deficient number, since it is larger than the sum of its proper divisors (1087929).

72886687 is a wasteful number, since it uses less digits than its factorization.

72886687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087928.

The product of its digits is 1806336, while the sum is 52.

The square root of 72886687 is about 8537.3700282933. The cubic root of 72886687 is about 417.7175640646.

The spelling of 72886687 in words is "seventy-two million, eight hundred eighty-six thousand, six hundred eighty-seven".