89980813 has 8 divisors (see below), whose sum is σ = 102602808. Its totient is φ = 78173184.

The previous prime is 89980783. The next prime is 89980819. The reversal of 89980813 is 31808998.

It can be written as a sum of positive squares in 4 ways, for example, as 25371369 + 64609444 = 5037^2 + 8038^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89980813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89980819) 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, 203356 + ... + 203797.

It is an arithmetic number, because the mean of its divisors is an integer number (12825351).

Almost surely, 2^89980813 is an apocalyptic number.

It is an amenable number.

89980813 is a deficient number, since it is larger than the sum of its proper divisors (12621995).

89980813 is a wasteful number, since it uses less digits than its factorization.

89980813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407183.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 89980813 is about 9485.8216829118. The cubic root of 89980813 is about 448.1086262024.

The spelling of 89980813 in words is "eighty-nine million, nine hundred eighty thousand, eight hundred thirteen".