86920861 has 4 divisors (see below), whose sum is σ = 89040924. Its totient is φ = 84800800.

The previous prime is 86920849. The next prime is 86920919. The reversal of 86920861 is 16802968.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6728836 + 80192025 = 2594^2 + 8955^2 .

It is a cyclic number.

It is not a de Polignac number, because 86920861 - 2⁵ = 86920829 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 (86920261) 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, 1059970 + ... + 1060051.

It is an arithmetic number, because the mean of its divisors is an integer number (22260231).

Almost surely, 2^86920861 is an apocalyptic number.

It is an amenable number.

86920861 is a deficient number, since it is larger than the sum of its proper divisors (2120063).

86920861 is a wasteful number, since it uses less digits than its factorization.

86920861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120062.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 86920861 is about 9323.1357922107. The cubic root of 86920861 is about 442.9703655949.

The spelling of 86920861 in words is "eighty-six million, nine hundred twenty thousand, eight hundred sixty-one".