90523903 has 4 divisors (see below), whose sum is σ = 90884808. Its totient is φ = 90163000.

The previous prime is 90523871. The next prime is 90523913. The reversal of 90523903 is 30932509.

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 90523903 - 2⁵ = 90523871 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90523913) 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, 180076 + ... + 180577.

It is an arithmetic number, because the mean of its divisors is an integer number (22721202).

Almost surely, 2^90523903 is an apocalyptic number.

90523903 is a deficient number, since it is larger than the sum of its proper divisors (360905).

90523903 is a wasteful number, since it uses less digits than its factorization.

90523903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360904.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 90523903 is about 9514.4050260644. The cubic root of 90523903 is about 449.0083562845.

The spelling of 90523903 in words is "ninety million, five hundred twenty-three thousand, nine hundred three".