86139619 has 2 divisors, whose sum is σ = 86139620. Its totient is φ = 86139618.

The previous prime is 86139583. The next prime is 86139637. The reversal of 86139619 is 91693168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86139619 - 2⁷ = 86139491 is a prime.

It is a super-2 number, since 2×86139619² = 14840067922930322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86139649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43069809 + 43069810.

It is an arithmetic number, because the mean of its divisors is an integer number (43069810).

Almost surely, 2^86139619 is an apocalyptic number.

86139619 is a deficient number, since it is larger than the sum of its proper divisors (1).

86139619 is an equidigital number, since it uses as much as digits as its factorization.

86139619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 86139619 is about 9281.1431946717. The cubic root of 86139619 is about 441.6392349087.

The spelling of 86139619 in words is "eighty-six million, one hundred thirty-nine thousand, six hundred nineteen".