90500243 has 4 divisors (see below), whose sum is σ = 92707608. Its totient is φ = 88292880.

The previous prime is 90500233. The next prime is 90500257. The reversal of 90500243 is 34200509.

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 90500243 - 2⁴ = 90500227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90500233) 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, 1103621 + ... + 1103702.

It is an arithmetic number, because the mean of its divisors is an integer number (23176902).

Almost surely, 2^90500243 is an apocalyptic number.

90500243 is a deficient number, since it is larger than the sum of its proper divisors (2207365).

90500243 is a wasteful number, since it uses less digits than its factorization.

90500243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207364.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 90500243 is about 9513.1615670081. The cubic root of 90500243 is about 448.9692341557.

The spelling of 90500243 in words is "ninety million, five hundred thousand, two hundred forty-three".