86578291 has 2 divisors, whose sum is σ = 86578292. Its totient is φ = 86578290.

The previous prime is 86578249. The next prime is 86578339. The reversal of 86578291 is 19287568.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86578291 - 2¹⁵ = 86545523 is a prime.

It is not a weakly prime, because it can be changed into another prime (86578201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43289145 + 43289146.

It is an arithmetic number, because the mean of its divisors is an integer number (43289146).

Almost surely, 2^86578291 is an apocalyptic number.

86578291 is a deficient number, since it is larger than the sum of its proper divisors (1).

86578291 is an equidigital number, since it uses as much as digits as its factorization.

86578291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The square root of 86578291 is about 9304.7456171569. The cubic root of 86578291 is about 442.3876587147.

The spelling of 86578291 in words is "eighty-six million, five hundred seventy-eight thousand, two hundred ninety-one".