86797639 has 2 divisors, whose sum is σ = 86797640. Its totient is φ = 86797638.

The previous prime is 86797591. The next prime is 86797649. The reversal of 86797639 is 93679768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86797639 - 2⁹ = 86797127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86797639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86797649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43398819 + 43398820.

It is an arithmetic number, because the mean of its divisors is an integer number (43398820).

Almost surely, 2^86797639 is an apocalyptic number.

86797639 is a deficient number, since it is larger than the sum of its proper divisors (1).

86797639 is an equidigital number, since it uses as much as digits as its factorization.

86797639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 55.

The square root of 86797639 is about 9316.5250496094. The cubic root of 86797639 is about 442.7609432639.

The spelling of 86797639 in words is "eighty-six million, seven hundred ninety-seven thousand, six hundred thirty-nine".