90542503 has 4 divisors (see below), whose sum is σ = 90609448. Its totient is φ = 90475560.

The previous prime is 90542489. The next prime is 90542509. The reversal of 90542503 is 30524509.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90542503 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 (90542509) 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, 31401 + ... + 34162.

It is an arithmetic number, because the mean of its divisors is an integer number (22652362).

Almost surely, 2^90542503 is an apocalyptic number.

90542503 is a deficient number, since it is larger than the sum of its proper divisors (66945).

90542503 is a wasteful number, since it uses less digits than its factorization.

90542503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66944.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 90542503 is about 9515.3824410793. The cubic root of 90542503 is about 449.0391068495.

The spelling of 90542503 in words is "ninety million, five hundred forty-two thousand, five hundred three".