86118399 has 12 divisors (see below), whose sum is σ = 124527312. Its totient is φ = 57350400.

The previous prime is 86118343. The next prime is 86118401. The reversal of 86118399 is 99381168.

It is a Cunningham number, because it is equal to 9280²-1.

It is not a de Polignac number, because 86118399 - 2⁸ = 86118143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86118199) 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, 4639 + ... + 13919.

It is an arithmetic number, because the mean of its divisors is an integer number (10377276).

Almost surely, 2^86118399 is an apocalyptic number.

86118399 is a deficient number, since it is larger than the sum of its proper divisors (38408913).

86118399 is a wasteful number, since it uses less digits than its factorization.

86118399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10318 (or 10315 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 86118399 is about 9279.9999461207. Note that the first 4 decimals coincide. The cubic root of 86118399 is about 441.6029668348.

The spelling of 86118399 in words is "eighty-six million, one hundred eighteen thousand, three hundred ninety-nine".