80538569 has 2 divisors, whose sum is σ = 80538570. Its totient is φ = 80538568.

The previous prime is 80538559. The next prime is 80538607. The reversal of 80538569 is 96583508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68890000 + 11648569 = 8300^2 + 3413^2 .

It is a cyclic number.

It is not a de Polignac number, because 80538569 - 2⁴ = 80538553 is a prime.

It is a super-2 number, since 2×80538569² = 12972922193135522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80538509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40269284 + 40269285.

It is an arithmetic number, because the mean of its divisors is an integer number (40269285).

Almost surely, 2^80538569 is an apocalyptic number.

It is an amenable number.

80538569 is a deficient number, since it is larger than the sum of its proper divisors (1).

80538569 is an equidigital number, since it uses as much as digits as its factorization.

80538569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 80538569 is about 8974.3283314129. The cubic root of 80538569 is about 431.8517027133.

The spelling of 80538569 in words is "eighty million, five hundred thirty-eight thousand, five hundred sixty-nine".