90038693 has 4 divisors (see below), whose sum is σ = 90075168. Its totient is φ = 90002220.

The previous prime is 90038677. The next prime is 90038713. The reversal of 90038693 is 39683009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39683009 = 137 ⋅289657.

It is a cyclic number.

It is not a de Polignac number, because 90038693 - 2⁴ = 90038677 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 (90038293) 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, 14243 + ... + 19568.

It is an arithmetic number, because the mean of its divisors is an integer number (22518792).

Almost surely, 2^90038693 is an apocalyptic number.

It is an amenable number.

90038693 is a deficient number, since it is larger than the sum of its proper divisors (36475).

90038693 is a wasteful number, since it uses less digits than its factorization.

90038693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36474.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 90038693 is about 9488.8720615255. The cubic root of 90038693 is about 448.2046873040.

It can be divided in two parts, 900 and 38693, that added together give a palindrome (39593).

The spelling of 90038693 in words is "ninety million, thirty-eight thousand, six hundred ninety-three".