86892721 has 4 divisors (see below), whose sum is σ = 89695744. Its totient is φ = 84089700.

The previous prime is 86892709. The next prime is 86892733. The reversal of 86892721 is 12729868.

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 an interprime number because it is at equal distance from previous prime (86892709) and next prime (86892733).

It is a cyclic number.

It is not a de Polignac number, because 86892721 - 2⁹ = 86892209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86892521) 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, 1401465 + ... + 1401526.

It is an arithmetic number, because the mean of its divisors is an integer number (22423936).

Almost surely, 2^86892721 is an apocalyptic number.

It is an amenable number.

86892721 is a deficient number, since it is larger than the sum of its proper divisors (2803023).

86892721 is a wasteful number, since it uses less digits than its factorization.

86892721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803022.

The product of its digits is 96768, while the sum is 43.

The square root of 86892721 is about 9321.6265211603. The cubic root of 86892721 is about 442.9225576182.

The spelling of 86892721 in words is "eighty-six million, eight hundred ninety-two thousand, seven hundred twenty-one".