86791951 has 2 divisors, whose sum is σ = 86791952. Its totient is φ = 86791950.

The previous prime is 86791937. The next prime is 86791967. The reversal of 86791951 is 15919768.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86791951 - 2¹⁷ = 86660879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86791451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43395975 + 43395976.

It is an arithmetic number, because the mean of its divisors is an integer number (43395976).

Almost surely, 2^86791951 is an apocalyptic number.

86791951 is a deficient number, since it is larger than the sum of its proper divisors (1).

86791951 is an equidigital number, since it uses as much as digits as its factorization.

86791951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 46.

The square root of 86791951 is about 9316.2197805762. The cubic root of 86791951 is about 442.7512714215.

The spelling of 86791951 in words is "eighty-six million, seven hundred ninety-one thousand, nine hundred fifty-one".