89990813 has 8 divisors (see below), whose sum is σ = 98249760. Its totient is φ = 81744880.

The previous prime is 89990807. The next prime is 89990819. The reversal of 89990813 is 31809998.

It is an interprime number because it is at equal distance from previous prime (89990807) and next prime (89990819).

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 89990813 - 2⁶ = 89990749 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 (89990819) 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, 16406 + ... + 21192.

It is an arithmetic number, because the mean of its divisors is an integer number (12281220).

Almost surely, 2^89990813 is an apocalyptic number.

It is an amenable number.

89990813 is a deficient number, since it is larger than the sum of its proper divisors (8258947).

89990813 is a wasteful number, since it uses less digits than its factorization.

89990813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6507.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 89990813 is about 9486.3487707337. The cubic root of 89990813 is about 448.1252257423.

The spelling of 89990813 in words is "eighty-nine million, nine hundred ninety thousand, eight hundred thirteen".