86587639 has 2 divisors, whose sum is σ = 86587640. Its totient is φ = 86587638.

The previous prime is 86587573. The next prime is 86587643. The reversal of 86587639 is 93678568.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86587639 - 2¹¹ = 86585591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86587339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43293819 + 43293820.

It is an arithmetic number, because the mean of its divisors is an integer number (43293820).

Almost surely, 2^86587639 is an apocalyptic number.

86587639 is a deficient number, since it is larger than the sum of its proper divisors (1).

86587639 is an equidigital number, since it uses as much as digits as its factorization.

86587639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 52.

The square root of 86587639 is about 9305.2479279168. The cubic root of 86587639 is about 442.4035799153.

The spelling of 86587639 in words is "eighty-six million, five hundred eighty-seven thousand, six hundred thirty-nine".