90213903 has 24 divisors (see below), whose sum is σ = 140736960. Its totient is φ = 55356480.

The previous prime is 90213887. The next prime is 90213923. The reversal of 90213903 is 30931209.

It is not a de Polignac number, because 90213903 - 2⁴ = 90213887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90213923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49533 + ... + 51321.

It is an arithmetic number, because the mean of its divisors is an integer number (5864040).

Almost surely, 2^90213903 is an apocalyptic number.

90213903 is a deficient number, since it is larger than the sum of its proper divisors (50523057).

90213903 is a wasteful number, since it uses less digits than its factorization.

90213903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 90213903 is about 9498.0999678883. The cubic root of 90213903 is about 448.4952255805.

The spelling of 90213903 in words is "ninety million, two hundred thirteen thousand, nine hundred three".