90190903 has 8 divisors (see below), whose sum is σ = 99636480. Its totient is φ = 80953080.

The previous prime is 90190897. The next prime is 90190921. The reversal of 90190903 is 30909109.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90190903 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 (90190943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51025 + ... + 52762.

It is an arithmetic number, because the mean of its divisors is an integer number (12454560).

Almost surely, 2^90190903 is an apocalyptic number.

90190903 is a deficient number, since it is larger than the sum of its proper divisors (9445577).

90190903 is a wasteful number, since it uses less digits than its factorization.

90190903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103877.

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

The square root of 90190903 is about 9496.8891222337. The cubic root of 90190903 is about 448.4571077790.

The spelling of 90190903 in words is "ninety million, one hundred ninety thousand, nine hundred three".