90200903 has 4 divisors (see below), whose sum is σ = 97139448. Its totient is φ = 83262360.

The previous prime is 90200899. The next prime is 90200927. The reversal of 90200903 is 30900209.

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 90200903 - 2² = 90200899 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 (90200953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3469253 + ... + 3469278.

It is an arithmetic number, because the mean of its divisors is an integer number (24284862).

Almost surely, 2^90200903 is an apocalyptic number.

90200903 is a deficient number, since it is larger than the sum of its proper divisors (6938545).

90200903 is a wasteful number, since it uses less digits than its factorization.

90200903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6938544.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 90200903 is about 9497.4155958345. The cubic root of 90200903 is about 448.4736815323.

The spelling of 90200903 in words is "ninety million, two hundred thousand, nine hundred three".