86797979 has 2 divisors, whose sum is σ = 86797980. Its totient is φ = 86797978.

The previous prime is 86797939. The next prime is 86797981. The reversal of 86797979 is 97979768.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86797979 - 2⁸ = 86797723 is a prime.

Together with 86797981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86797939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43398989 + 43398990.

It is an arithmetic number, because the mean of its divisors is an integer number (43398990).

Almost surely, 2^86797979 is an apocalyptic number.

86797979 is a deficient number, since it is larger than the sum of its proper divisors (1).

86797979 is an equidigital number, since it uses as much as digits as its factorization.

86797979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12002256, while the sum is 62.

The square root of 86797979 is about 9316.5432967383. The cubic root of 86797979 is about 442.7615213846.

The spelling of 86797979 in words is "eighty-six million, seven hundred ninety-seven thousand, nine hundred seventy-nine".