86538239 has 2 divisors, whose sum is σ = 86538240. Its totient is φ = 86538238.

The previous prime is 86538223. The next prime is 86538307. The reversal of 86538239 is 93283568.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86538239 - 2⁴ = 86538223 is a prime.

It is a super-2 number, since 2×86538239² = 14977733618442242, 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 86538239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86538209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43269119 + 43269120.

It is an arithmetic number, because the mean of its divisors is an integer number (43269120).

Almost surely, 2^86538239 is an apocalyptic number.

86538239 is a deficient number, since it is larger than the sum of its proper divisors (1).

86538239 is an equidigital number, since it uses as much as digits as its factorization.

86538239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 86538239 is about 9302.5931331000. The cubic root of 86538239 is about 442.3194305124.

The spelling of 86538239 in words is "eighty-six million, five hundred thirty-eight thousand, two hundred thirty-nine".