80940569 has 2 divisors, whose sum is σ = 80940570. Its totient is φ = 80940568.

The previous prime is 80940557. The next prime is 80940581. The reversal of 80940569 is 96504908.

It is a balanced prime because it is at equal distance from previous prime (80940557) and next prime (80940581).

It can be written as a sum of positive squares in only one way, i.e., 53114944 + 27825625 = 7288^2 + 5275^2 .

It is a cyclic number.

It is not a de Polignac number, because 80940569 - 2⁸ = 80940313 is a prime.

It is a super-2 number, since 2×80940569² = 13102751420087522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80940599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40470284 + 40470285.

It is an arithmetic number, because the mean of its divisors is an integer number (40470285).

Almost surely, 2^80940569 is an apocalyptic number.

It is an amenable number.

80940569 is a deficient number, since it is larger than the sum of its proper divisors (1).

80940569 is an equidigital number, since it uses as much as digits as its factorization.

80940569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 80940569 is about 8996.6976719238. The cubic root of 80940569 is about 432.5690250353.

The spelling of 80940569 in words is "eighty million, nine hundred forty thousand, five hundred sixty-nine".