86644121 has 16 divisors (see below), whose sum is σ = 94993920. Its totient is φ = 78693120.

The previous prime is 86644091. The next prime is 86644127. The reversal of 86644121 is 12144668.

It is a cyclic number.

It is not a de Polignac number, because 86644121 - 2²² = 82449817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86644127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86936 + ... + 87926.

It is an arithmetic number, because the mean of its divisors is an integer number (5937120).

Almost surely, 2^86644121 is an apocalyptic number.

It is an amenable number.

86644121 is a deficient number, since it is larger than the sum of its proper divisors (8349799).

86644121 is a wasteful number, since it uses less digits than its factorization.

86644121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184.

The product of its digits is 9216, while the sum is 32.

The square root of 86644121 is about 9308.2823872076. The cubic root of 86644121 is about 442.4997537956.

Adding to 86644121 its reverse (12144668), we get a palindrome (98788789).

The spelling of 86644121 in words is "eighty-six million, six hundred forty-four thousand, one hundred twenty-one".