89904013 has 4 divisors (see below), whose sum is σ = 91994848. Its totient is φ = 87813180.

The previous prime is 89903959. The next prime is 89904019. The reversal of 89904013 is 31040998.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31040998 = 2 ⋅15520499.

It is a cyclic number.

It is not a de Polignac number, because 89904013 - 2²¹ = 87806861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89904013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89904019) 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, 1045353 + ... + 1045438.

It is an arithmetic number, because the mean of its divisors is an integer number (22998712).

Almost surely, 2^89904013 is an apocalyptic number.

It is an amenable number.

89904013 is a deficient number, since it is larger than the sum of its proper divisors (2090835).

89904013 is a wasteful number, since it uses less digits than its factorization.

89904013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090834.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 89904013 is about 9481.7726718162. The cubic root of 89904013 is about 447.9811007254.

The spelling of 89904013 in words is "eighty-nine million, nine hundred four thousand, thirteen".