86499139 has 2 divisors, whose sum is σ = 86499140. Its totient is φ = 86499138.

The previous prime is 86499107. The next prime is 86499151. The reversal of 86499139 is 93199468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86499139 - 2⁵ = 86499107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86499092 and 86499101.

It is not a weakly prime, because it can be changed into another prime (86469139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43249569 + 43249570.

It is an arithmetic number, because the mean of its divisors is an integer number (43249570).

Almost surely, 2^86499139 is an apocalyptic number.

86499139 is a deficient number, since it is larger than the sum of its proper divisors (1).

86499139 is an equidigital number, since it uses as much as digits as its factorization.

86499139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 49.

The square root of 86499139 is about 9300.4913311072. The cubic root of 86499139 is about 442.2528037229.

The spelling of 86499139 in words is "eighty-six million, four hundred ninety-nine thousand, one hundred thirty-nine".