90438163 has 4 divisors (see below), whose sum is σ = 90474280. Its totient is φ = 90402048.

The previous prime is 90438133. The next prime is 90438343. The reversal of 90438163 is 36183409.

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 90438163 - 2⁹ = 90437651 is a prime.

It is a super-2 number, since 2×90438163² = 16358122653629138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90438133) 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, 13998 + ... + 19411.

It is an arithmetic number, because the mean of its divisors is an integer number (22618570).

Almost surely, 2^90438163 is an apocalyptic number.

90438163 is a deficient number, since it is larger than the sum of its proper divisors (36117).

90438163 is a wasteful number, since it uses less digits than its factorization.

90438163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36116.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 90438163 is about 9509.8981592865. The cubic root of 90438163 is about 448.8665516116.

It can be divided in two parts, 90438 and 163, that added together give a square (90601 = 301²).

The spelling of 90438163 in words is "ninety million, four hundred thirty-eight thousand, one hundred sixty-three".