86157919 has 2 divisors, whose sum is σ = 86157920. Its totient is φ = 86157918.

The previous prime is 86157893. The next prime is 86157923. The reversal of 86157919 is 91975168.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86157919 - 2²³ = 77769311 is a prime.

It is a super-2 number, since 2×86157919² = 14846374012821122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86157119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43078959 + 43078960.

It is an arithmetic number, because the mean of its divisors is an integer number (43078960).

Almost surely, 2^86157919 is an apocalyptic number.

86157919 is a deficient number, since it is larger than the sum of its proper divisors (1).

86157919 is an equidigital number, since it uses as much as digits as its factorization.

86157919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 46.

The square root of 86157919 is about 9282.1290122471. The cubic root of 86157919 is about 441.6705074940.

The spelling of 86157919 in words is "eighty-six million, one hundred fifty-seven thousand, nine hundred nineteen".