80897569 has 4 divisors (see below), whose sum is σ = 83507200. Its totient is φ = 78287940.

The previous prime is 80897563. The next prime is 80897629. The reversal of 80897569 is 96579808.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80897569 - 2³ = 80897561 is a prime.

It is a super-2 number, since 2×80897569² = 13088833340219522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80897561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1304769 + ... + 1304830.

It is an arithmetic number, because the mean of its divisors is an integer number (20876800).

Almost surely, 2^80897569 is an apocalyptic number.

It is an amenable number.

80897569 is a deficient number, since it is larger than the sum of its proper divisors (2609631).

80897569 is a wasteful number, since it uses less digits than its factorization.

80897569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609630.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 80897569 is about 8994.3075886919. The cubic root of 80897569 is about 432.4924101266.

The spelling of 80897569 in words is "eighty million, eight hundred ninety-seven thousand, five hundred sixty-nine".