86752921 has 12 divisors (see below), whose sum is σ = 93008412. Its totient is φ = 80633856.

The previous prime is 86752909. The next prime is 86752931. The reversal of 86752921 is 12925768.

It can be written as a sum of positive squares in 6 ways, for example, as 541696 + 86211225 = 736^2 + 9285^2 .

It is not a de Polignac number, because 86752921 - 2⁵ = 86752889 is a prime.

It is a Duffinian number.

Its product of digits (60480) is a multiple of the sum of its prime factors (540).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86752931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 449401 + ... + 449593.

It is an arithmetic number, because the mean of its divisors is an integer number (7750701).

Almost surely, 2^86752921 is an apocalyptic number.

It is an amenable number.

86752921 is a deficient number, since it is larger than the sum of its proper divisors (6255491).

86752921 is a wasteful number, since it uses less digits than its factorization.

86752921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 347 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 86752921 is about 9314.1248112745. The cubic root of 86752921 is about 442.6848936338.

The spelling of 86752921 in words is "eighty-six million, seven hundred fifty-two thousand, nine hundred twenty-one".