86975879 has 2 divisors, whose sum is σ = 86975880. Its totient is φ = 86975878.

The previous prime is 86975869. The next prime is 86975881. The reversal of 86975879 is 97857968.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86975879 is a prime.

Together with 86975881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86975839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43487939 + 43487940.

It is an arithmetic number, because the mean of its divisors is an integer number (43487940).

Almost surely, 2^86975879 is an apocalyptic number.

86975879 is a deficient number, since it is larger than the sum of its proper divisors (1).

86975879 is an equidigital number, since it uses as much as digits as its factorization.

86975879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 59.

The square root of 86975879 is about 9326.0859421303. The cubic root of 86975879 is about 443.0638076947.

The spelling of 86975879 in words is "eighty-six million, nine hundred seventy-five thousand, eight hundred seventy-nine".