86766731 has 4 divisors (see below), whose sum is σ = 86868600. Its totient is φ = 86664864.

The previous prime is 86766721. The next prime is 86766761. The reversal of 86766731 is 13766768.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86766731 is a prime.

It is a super-2 number, since 2×86766731² = 15056931216852722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86766721) 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, 49646 + ... + 51363.

It is an arithmetic number, because the mean of its divisors is an integer number (21717150).

Almost surely, 2^86766731 is an apocalyptic number.

86766731 is a deficient number, since it is larger than the sum of its proper divisors (101869).

86766731 is a wasteful number, since it uses less digits than its factorization.

86766731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101868.

The product of its digits is 254016, while the sum is 44.

The square root of 86766731 is about 9314.8661289360. The cubic root of 86766731 is about 442.7083823876.

The spelling of 86766731 in words is "eighty-six million, seven hundred sixty-six thousand, seven hundred thirty-one".