86542919 has 2 divisors, whose sum is σ = 86542920. Its totient is φ = 86542918.

The previous prime is 86542909. The next prime is 86542927. The reversal of 86542919 is 91924568.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86542919 is a prime.

It is a super-2 number, since 2×86542919² = 14979353658081122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86542919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86542909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43271459 + 43271460.

It is an arithmetic number, because the mean of its divisors is an integer number (43271460).

Almost surely, 2^86542919 is an apocalyptic number.

86542919 is a deficient number, since it is larger than the sum of its proper divisors (1).

86542919 is an equidigital number, since it uses as much as digits as its factorization.

86542919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 86542919 is about 9302.8446724644. The cubic root of 86542919 is about 442.3274039341.

The spelling of 86542919 in words is "eighty-six million, five hundred forty-two thousand, nine hundred nineteen".