81060569 has 2 divisors, whose sum is σ = 81060570. Its totient is φ = 81060568.

The previous prime is 81060527. The next prime is 81060589. The reversal of 81060569 is 96506018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80910025 + 150544 = 8995^2 + 388^2 .

It is a cyclic number.

It is not a de Polignac number, because 81060569 - 2²⁰ = 80011993 is a prime.

It is a super-2 number, since 2×81060569² = 13141631693207522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (81060509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40530284 + 40530285.

It is an arithmetic number, because the mean of its divisors is an integer number (40530285).

Almost surely, 2^81060569 is an apocalyptic number.

It is an amenable number.

81060569 is a deficient number, since it is larger than the sum of its proper divisors (1).

81060569 is an equidigital number, since it uses as much as digits as its factorization.

81060569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 81060569 is about 9003.3643156322. The cubic root of 81060569 is about 432.7826906594.

The spelling of 81060569 in words is "eighty-one million, sixty thousand, five hundred sixty-nine".