80900639 has 2 divisors, whose sum is σ = 80900640. Its totient is φ = 80900638.

The previous prime is 80900627. The next prime is 80900647. The reversal of 80900639 is 93600908.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80900639 - 2⁸ = 80900383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80900599 and 80900608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80900539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40450319 + 40450320.

It is an arithmetic number, because the mean of its divisors is an integer number (40450320).

Almost surely, 2^80900639 is an apocalyptic number.

80900639 is a deficient number, since it is larger than the sum of its proper divisors (1).

80900639 is an equidigital number, since it uses as much as digits as its factorization.

80900639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 80900639 is about 8994.4782505713. The cubic root of 80900639 is about 432.4978809746.

The spelling of 80900639 in words is "eighty million, nine hundred thousand, six hundred thirty-nine".