86747879 has 2 divisors, whose sum is σ = 86747880. Its totient is φ = 86747878.

The previous prime is 86747873. The next prime is 86747891. The reversal of 86747879 is 97874768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86747879 - 2⁸ = 86747623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86747873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43373939 + 43373940.

It is an arithmetic number, because the mean of its divisors is an integer number (43373940).

Almost surely, 2^86747879 is an apocalyptic number.

86747879 is a deficient number, since it is larger than the sum of its proper divisors (1).

86747879 is an equidigital number, since it uses as much as digits as its factorization.

86747879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4741632, while the sum is 56.

The square root of 86747879 is about 9313.8541431568. The cubic root of 86747879 is about 442.6763173213.

The spelling of 86747879 in words is "eighty-six million, seven hundred forty-seven thousand, eight hundred seventy-nine".