80309569 has 2 divisors, whose sum is σ = 80309570. Its totient is φ = 80309568.

The previous prime is 80309549. The next prime is 80309587. The reversal of 80309569 is 96590308.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78588225 + 1721344 = 8865^2 + 1312^2 .

It is a cyclic number.

It is not a de Polignac number, because 80309569 - 2⁷ = 80309441 is a prime.

It is a super-2 number, since 2×80309569² = 12899253745931522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80309549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40154784 + 40154785.

It is an arithmetic number, because the mean of its divisors is an integer number (40154785).

Almost surely, 2^80309569 is an apocalyptic number.

It is an amenable number.

80309569 is a deficient number, since it is larger than the sum of its proper divisors (1).

80309569 is an equidigital number, since it uses as much as digits as its factorization.

80309569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 80309569 is about 8961.5606341753. The cubic root of 80309569 is about 431.4420111420.

The spelling of 80309569 in words is "eighty million, three hundred nine thousand, five hundred sixty-nine".