86897879 has 2 divisors, whose sum is σ = 86897880. Its totient is φ = 86897878.

The previous prime is 86897869. The next prime is 86897917. The reversal of 86897879 is 97879868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86897879 - 2⁸ = 86897623 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86897869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43448939 + 43448940.

It is an arithmetic number, because the mean of its divisors is an integer number (43448940).

Almost surely, 2^86897879 is an apocalyptic number.

86897879 is a deficient number, since it is larger than the sum of its proper divisors (1).

86897879 is an equidigital number, since it uses as much as digits as its factorization.

86897879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 62.

The square root of 86897879 is about 9321.9031855088. The cubic root of 86897879 is about 442.9313214875.

The spelling of 86897879 in words is "eighty-six million, eight hundred ninety-seven thousand, eight hundred seventy-nine".