86409251 has 2 divisors, whose sum is σ = 86409252. Its totient is φ = 86409250.

The previous prime is 86409223. The next prime is 86409269. The reversal of 86409251 is 15290468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86409251 - 2⁶ = 86409187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86405251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43204625 + 43204626.

It is an arithmetic number, because the mean of its divisors is an integer number (43204626).

Almost surely, 2^86409251 is an apocalyptic number.

86409251 is a deficient number, since it is larger than the sum of its proper divisors (1).

86409251 is an equidigital number, since it uses as much as digits as its factorization.

86409251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 86409251 is about 9295.6576421467. The cubic root of 86409251 is about 442.0995575031.

The spelling of 86409251 in words is "eighty-six million, four hundred nine thousand, two hundred fifty-one".