90365903 has 4 divisors (see below), whose sum is σ = 90941640. Its totient is φ = 89790168.

The previous prime is 90365861. The next prime is 90365909. The reversal of 90365903 is 30956309.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30956309 = 37 ⋅836657.

It is a cyclic number.

It is not a de Polignac number, because 90365903 - 2⁶ = 90365839 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 (90365909) 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, 287633 + ... + 287946.

It is an arithmetic number, because the mean of its divisors is an integer number (22735410).

Almost surely, 2^90365903 is an apocalyptic number.

90365903 is a deficient number, since it is larger than the sum of its proper divisors (575737).

90365903 is a wasteful number, since it uses less digits than its factorization.

90365903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575736.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 90365903 is about 9506.0982006289. The cubic root of 90365903 is about 448.7469717856.

The spelling of 90365903 in words is "ninety million, three hundred sixty-five thousand, nine hundred three".