80956489 has 4 divisors (see below), whose sum is σ = 82065556. Its totient is φ = 79847424.

The previous prime is 80956459. The next prime is 80956501. The reversal of 80956489 is 98465908.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25200400 + 55756089 = 5020^2 + 7467^2 .

It is a cyclic number.

It is not a de Polignac number, because 80956489 - 2⁷ = 80956361 is a prime.

It is a super-2 number, since 2×80956489² = 13107906222414242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80956409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554424 + ... + 554569.

It is an arithmetic number, because the mean of its divisors is an integer number (20516389).

Almost surely, 2^80956489 is an apocalyptic number.

It is an amenable number.

80956489 is a deficient number, since it is larger than the sum of its proper divisors (1109067).

80956489 is a wasteful number, since it uses less digits than its factorization.

80956489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109066.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 80956489 is about 8997.5823975110. The cubic root of 80956489 is about 432.5973834861.

The spelling of 80956489 in words is "eighty million, nine hundred fifty-six thousand, four hundred eighty-nine".