86137819 has 2 divisors, whose sum is σ = 86137820. Its totient is φ = 86137818.

The previous prime is 86137787. The next prime is 86137823. The reversal of 86137819 is 91873168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86137819 - 2⁵ = 86137787 is a prime.

It is a super-2 number, since 2×86137819² = 14839447724153522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86137319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43068909 + 43068910.

It is an arithmetic number, because the mean of its divisors is an integer number (43068910).

Almost surely, 2^86137819 is an apocalyptic number.

86137819 is a deficient number, since it is larger than the sum of its proper divisors (1).

86137819 is an equidigital number, since it uses as much as digits as its factorization.

86137819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 86137819 is about 9281.0462233522. The cubic root of 86137819 is about 441.6361586775.

The spelling of 86137819 in words is "eighty-six million, one hundred thirty-seven thousand, eight hundred nineteen".