80779577 has 2 divisors, whose sum is σ = 80779578. Its totient is φ = 80779576.

The previous prime is 80779549. The next prime is 80779603. The reversal of 80779577 is 77597708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42784681 + 37994896 = 6541^2 + 6164^2 .

It is a cyclic number.

It is not a de Polignac number, because 80779577 - 2⁶ = 80779513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80779277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40389788 + 40389789.

It is an arithmetic number, because the mean of its divisors is an integer number (40389789).

Almost surely, 2^80779577 is an apocalyptic number.

It is an amenable number.

80779577 is a deficient number, since it is larger than the sum of its proper divisors (1).

80779577 is an equidigital number, since it uses as much as digits as its factorization.

80779577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864360, while the sum is 50.

The square root of 80779577 is about 8987.7459354390. The cubic root of 80779577 is about 432.2820392621.

The spelling of 80779577 in words is "eighty million, seven hundred seventy-nine thousand, five hundred seventy-seven".