90038479 has 4 divisors (see below), whose sum is σ = 90128376. Its totient is φ = 89948584.

The previous prime is 90038471. The next prime is 90038489. The reversal of 90038479 is 97483009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97483009 = 13 ⋅7498693.

It is a cyclic number.

It is not a de Polignac number, because 90038479 - 2³ = 90038471 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90038471) 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, 43429 + ... + 45454.

It is an arithmetic number, because the mean of its divisors is an integer number (22532094).

Almost surely, 2^90038479 is an apocalyptic number.

90038479 is a deficient number, since it is larger than the sum of its proper divisors (89897).

90038479 is a wasteful number, since it uses less digits than its factorization.

90038479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89896.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 90038479 is about 9488.8607851522. The cubic root of 90038479 is about 448.2043322127.

The spelling of 90038479 in words is "ninety million, thirty-eight thousand, four hundred seventy-nine".