86596821 has 6 divisors (see below), whose sum is σ = 125084310. Its totient is φ = 57731208.

The previous prime is 86596801. The next prime is 86596849. The reversal of 86596821 is 12869568.

It can be written as a sum of positive squares in only one way, i.e., 77686596 + 8910225 = 8814^2 + 2985^2 .

It is not a de Polignac number, because 86596821 - 2⁵ = 86596789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86596801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4810926 + ... + 4810943.

It is an arithmetic number, because the mean of its divisors is an integer number (20847385).

Almost surely, 2^86596821 is an apocalyptic number.

It is an amenable number.

86596821 is a deficient number, since it is larger than the sum of its proper divisors (38487489).

86596821 is a wasteful number, since it uses less digits than its factorization.

86596821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9621875 (or 9621872 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 86596821 is about 9305.7412923421. The cubic root of 86596821 is about 442.4192172747.

The spelling of 86596821 in words is "eighty-six million, five hundred ninety-six thousand, eight hundred twenty-one".