80897869 has 8 divisors (see below), whose sum is σ = 87984792. Its totient is φ = 73934400.

The previous prime is 80897867. The next prime is 80897893. The reversal of 80897869 is 96879808.

It can be written as a sum of positive squares in 4 ways, for example, as 1010025 + 79887844 = 1005^2 + 8938^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80897869 - 2¹ = 80897867 is a prime.

It is a super-2 number, since 2×80897869² = 13088930417482322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80897867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29494 + ... + 32119.

It is an arithmetic number, because the mean of its divisors is an integer number (10998099).

Almost surely, 2^80897869 is an apocalyptic number.

It is an amenable number.

80897869 is a deficient number, since it is larger than the sum of its proper divisors (7086923).

80897869 is a wasteful number, since it uses less digits than its factorization.

80897869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61727.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The square root of 80897869 is about 8994.3242658912. The cubic root of 80897869 is about 432.4929447433.

The spelling of 80897869 in words is "eighty million, eight hundred ninety-seven thousand, eight hundred sixty-nine".