86378531 has 2 divisors, whose sum is σ = 86378532. Its totient is φ = 86378530.

The previous prime is 86378519. The next prime is 86378543. The reversal of 86378531 is 13587368.

It is a balanced prime because it is at equal distance from previous prime (86378519) and next prime (86378543).

It is a cyclic number.

It is not a de Polignac number, because 86378531 - 2¹⁰ = 86377507 is a prime.

It is a super-2 number, since 2×86378531² = 14922501235435922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86371531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43189265 + 43189266.

It is an arithmetic number, because the mean of its divisors is an integer number (43189266).

Almost surely, 2^86378531 is an apocalyptic number.

86378531 is a deficient number, since it is larger than the sum of its proper divisors (1).

86378531 is an equidigital number, since it uses as much as digits as its factorization.

86378531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 86378531 is about 9294.0051108228. The cubic root of 86378531 is about 442.0471599182.

The spelling of 86378531 in words is "eighty-six million, three hundred seventy-eight thousand, five hundred thirty-one".