80788889 has 2 divisors, whose sum is σ = 80788890. Its totient is φ = 80788888.

The previous prime is 80788861. The next prime is 80788909. The reversal of 80788889 is 98888708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67158025 + 13630864 = 8195^2 + 3692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80788889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80788849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40394444 + 40394445.

It is an arithmetic number, because the mean of its divisors is an integer number (40394445).

Almost surely, 2^80788889 is an apocalyptic number.

It is an amenable number.

80788889 is a deficient number, since it is larger than the sum of its proper divisors (1).

80788889 is an equidigital number, since it uses as much as digits as its factorization.

80788889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2064384, while the sum is 56.

The square root of 80788889 is about 8988.2639591859. The cubic root of 80788889 is about 432.2986493007.

The spelling of 80788889 in words is "eighty million, seven hundred eighty-eight thousand, eight hundred eighty-nine".