90910928193 has 4 divisors (see below), whose sum is σ = 121214570928. Its totient is φ = 60607285460.

The previous prime is 90910928179. The next prime is 90910928209. The reversal of 90910928193 is 39182901909.

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.

It is a cyclic number.

It is not a de Polignac number, because 90910928193 - 2¹⁴ = 90910911809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90910928293) 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, 15151821363 + ... + 15151821368.

It is an arithmetic number, because the mean of its divisors is an integer number (30303642732).

Almost surely, 2^90910928193 is an apocalyptic number.

It is an amenable number.

90910928193 is a deficient number, since it is larger than the sum of its proper divisors (30303642735).

90910928193 is a wasteful number, since it uses less digits than its factorization.

90910928193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30303642734.

The product of its (nonzero) digits is 314928, while the sum is 51.

The spelling of 90910928193 in words is "ninety billion, nine hundred ten million, nine hundred twenty-eight thousand, one hundred ninety-three".