80940889 has 2 divisors, whose sum is σ = 80940890. Its totient is φ = 80940888.

The previous prime is 80940869. The next prime is 80940901. The reversal of 80940889 is 98804908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49491225 + 31449664 = 7035^2 + 5608^2 .

It is a cyclic number.

It is not a de Polignac number, because 80940889 - 2¹³ = 80932697 is a prime.

It is a super-2 number, since 2×80940889² = 13102855024220642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80940809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40470444 + 40470445.

It is an arithmetic number, because the mean of its divisors is an integer number (40470445).

Almost surely, 2^80940889 is an apocalyptic number.

It is an amenable number.

80940889 is a deficient number, since it is larger than the sum of its proper divisors (1).

80940889 is an equidigital number, since it uses as much as digits as its factorization.

80940889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 80940889 is about 8996.7154562096. The cubic root of 80940889 is about 432.5695950911.

The spelling of 80940889 in words is "eighty million, nine hundred forty thousand, eight hundred eighty-nine".