90919091123 has 4 divisors (see below), whose sum is σ = 103907532720. Its totient is φ = 77930649528.

The previous prime is 90919091111. The next prime is 90919091129. The reversal of 90919091123 is 32119091909.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90919091123 - 2¹⁰ = 90919090099 is a prime.

It is a super-2 number, since 2×90919091123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90919091129) 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, 6494220788 + ... + 6494220801.

It is an arithmetic number, because the mean of its divisors is an integer number (25976883180).

Almost surely, 2^90919091123 is an apocalyptic number.

90919091123 is a deficient number, since it is larger than the sum of its proper divisors (12988441597).

90919091123 is a wasteful number, since it uses less digits than its factorization.

90919091123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12988441596.

The product of its (nonzero) digits is 39366, while the sum is 44.

The spelling of 90919091123 in words is "ninety billion, nine hundred nineteen million, ninety-one thousand, one hundred twenty-three".