87659722639 has 2 divisors, whose sum is σ = 87659722640. Its totient is φ = 87659722638.

The previous prime is 87659722603. The next prime is 87659722663. The reversal of 87659722639 is 93622795678.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87659722639 - 2³⁵ = 53299984271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87659722439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43829861319 + 43829861320.

It is an arithmetic number, because the mean of its divisors is an integer number (43829861320).

Almost surely, 2^87659722639 is an apocalyptic number.

87659722639 is a deficient number, since it is larger than the sum of its proper divisors (1).

87659722639 is an equidigital number, since it uses as much as digits as its factorization.

87659722639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 64.

The spelling of 87659722639 in words is "eighty-seven billion, six hundred fifty-nine million, seven hundred twenty-two thousand, six hundred thirty-nine".