90100013123 has 4 divisors (see below), whose sum is σ = 90100619448. Its totient is φ = 90099406800.

The previous prime is 90100013089. The next prime is 90100013231. The reversal of 90100013123 is 32131000109.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 90100013123 - 2⁸ = 90100012867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90100013095 and 90100013104.

It is not an unprimeable number, because it can be changed into a prime (90100013323) 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, 87815 + ... + 433487.

It is an arithmetic number, because the mean of its divisors is an integer number (22525154862).

Almost surely, 2^90100013123 is an apocalyptic number.

90100013123 is a deficient number, since it is larger than the sum of its proper divisors (606325).

90100013123 is a wasteful number, since it uses less digits than its factorization.

90100013123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606324.

The product of its (nonzero) digits is 162, while the sum is 20.

The spelling of 90100013123 in words is "ninety billion, one hundred million, thirteen thousand, one hundred twenty-three".