86136819 has 32 divisors (see below), whose sum is σ = 121492224. Its totient is φ = 54238080.

The previous prime is 86136797. The next prime is 86136821. The reversal of 86136819 is 91863168.

It is not a de Polignac number, because 86136819 - 2⁷ = 86136691 is a prime.

It is a super-2 number, since 2×86136819² = 14839103174877522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86136839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 804964 + ... + 805070.

It is an arithmetic number, because the mean of its divisors is an integer number (3796632).

Almost surely, 2^86136819 is an apocalyptic number.

86136819 is a deficient number, since it is larger than the sum of its proper divisors (35355405).

86136819 is a wasteful number, since it uses less digits than its factorization.

86136819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307.

The product of its digits is 62208, while the sum is 42.

The square root of 86136819 is about 9280.9923499591. The cubic root of 86136819 is about 441.6344496416.

The spelling of 86136819 in words is "eighty-six million, one hundred thirty-six thousand, eight hundred nineteen".