90910109203 has 4 divisors (see below), whose sum is σ = 90928708920. Its totient is φ = 90891509488.

The previous prime is 90910109201. The next prime is 90910109263. The reversal of 90910109203 is 30290101909.

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 90910109203 - 2¹ = 90910109201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90910109201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9292525 + ... + 9302302.

It is an arithmetic number, because the mean of its divisors is an integer number (22732177230).

Almost surely, 2^90910109203 is an apocalyptic number.

90910109203 is a deficient number, since it is larger than the sum of its proper divisors (18599717).

90910109203 is a wasteful number, since it uses less digits than its factorization.

90910109203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18599716.

The product of its (nonzero) digits is 4374, while the sum is 34.

The spelling of 90910109203 in words is "ninety billion, nine hundred ten million, one hundred nine thousand, two hundred three".