86182721 has 4 divisors (see below), whose sum is σ = 86616000. Its totient is φ = 85749444.

The previous prime is 86182709. The next prime is 86182763. The reversal of 86182721 is 12728168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86182721 - 2¹⁸ = 85920577 is a prime.

It is a super-2 number, since 2×86182721² = 14854922797927682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86182781) 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, 216341 + ... + 216738.

It is an arithmetic number, because the mean of its divisors is an integer number (21654000).

Almost surely, 2^86182721 is an apocalyptic number.

It is an amenable number.

86182721 is a deficient number, since it is larger than the sum of its proper divisors (433279).

86182721 is a wasteful number, since it uses less digits than its factorization.

86182721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433278.

The product of its digits is 10752, while the sum is 35.

The square root of 86182721 is about 9283.4649242618. The cubic root of 86182721 is about 441.7128841789.

The spelling of 86182721 in words is "eighty-six million, one hundred eighty-two thousand, seven hundred twenty-one".