90909103 has 4 divisors (see below), whose sum is σ = 90940960. Its totient is φ = 90877248.

The previous prime is 90909101. The next prime is 90909109. The reversal of 90909103 is 30190909.

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 90909103 - 2¹ = 90909101 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 (90909101) 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, 11175 + ... + 17512.

It is an arithmetic number, because the mean of its divisors is an integer number (22735240).

Almost surely, 2^90909103 is an apocalyptic number.

90909103 is a deficient number, since it is larger than the sum of its proper divisors (31857).

90909103 is a wasteful number, since it uses less digits than its factorization.

90909103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31856.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 90909103 is about 9534.6265265085. The cubic root of 90909103 is about 449.6443329568.

The spelling of 90909103 in words is "ninety million, nine hundred nine thousand, one hundred three".