80998569 has 16 divisors (see below), whose sum is σ = 120144640. Its totient is φ = 53933040.

The previous prime is 80998559. The next prime is 80998597. The reversal of 80998569 is 96589908.

It is a de Polignac number, because none of the positive numbers 2^k-80998569 is a prime.

It is a super-2 number, since 2×80998569² = 13121536360095522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80998529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32019 + ... + 34455.

It is an arithmetic number, because the mean of its divisors is an integer number (7509040).

Almost surely, 2^80998569 is an apocalyptic number.

It is an amenable number.

80998569 is a deficient number, since it is larger than the sum of its proper divisors (39146071).

80998569 is a wasteful number, since it uses less digits than its factorization.

80998569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677 (or 3671 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 80998569 is about 8999.9204996489. The cubic root of 80998569 is about 432.6723231030.

The spelling of 80998569 in words is "eighty million, nine hundred ninety-eight thousand, five hundred sixty-nine".