90680813 has 8 divisors (see below), whose sum is σ = 92793600. Its totient is φ = 88575760.

The previous prime is 90680791. The next prime is 90680867. The reversal of 90680813 is 31808609.

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-90680813 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 (90680893) 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, 26543 + ... + 29763.

It is an arithmetic number, because the mean of its divisors is an integer number (11599200).

Almost surely, 2^90680813 is an apocalyptic number.

It is an amenable number.

90680813 is a deficient number, since it is larger than the sum of its proper divisors (2112787).

90680813 is a wasteful number, since it uses less digits than its factorization.

90680813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 90680813 is about 9522.6473734986. The cubic root of 90680813 is about 449.2676367280.

The spelling of 90680813 in words is "ninety million, six hundred eighty thousand, eight hundred thirteen".