90203039 has 4 divisors (see below), whose sum is σ = 90417720. Its totient is φ = 89988360.

The previous prime is 90203027. The next prime is 90203081. The reversal of 90203039 is 93030209.

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 90203039 - 2⁴ = 90203023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90202999 and 90203017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90203339) 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, 106709 + ... + 107550.

It is an arithmetic number, because the mean of its divisors is an integer number (22604430).

Almost surely, 2^90203039 is an apocalyptic number.

90203039 is a deficient number, since it is larger than the sum of its proper divisors (214681).

90203039 is a wasteful number, since it uses less digits than its factorization.

90203039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214680.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 90203039 is about 9497.5280468130. The cubic root of 90203039 is about 448.4772215273.

The spelling of 90203039 in words is "ninety million, two hundred three thousand, thirty-nine".