90239803 has 4 divisors (see below), whose sum is σ = 90280600. Its totient is φ = 90199008.

The previous prime is 90239783. The next prime is 90239813. The reversal of 90239803 is 30893209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30893209 = 23 ⋅1343183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90239803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90239813) 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, 16878 + ... + 21571.

It is an arithmetic number, because the mean of its divisors is an integer number (22570150).

Almost surely, 2^90239803 is an apocalyptic number.

90239803 is a deficient number, since it is larger than the sum of its proper divisors (40797).

90239803 is a wasteful number, since it uses less digits than its factorization.

90239803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40796.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 90239803 is about 9499.4633006291. The cubic root of 90239803 is about 448.5381417848.

The spelling of 90239803 in words is "ninety million, two hundred thirty-nine thousand, eight hundred three".