90111203 has 32 divisors (see below), whose sum is σ = 121282560. Its totient is φ = 64903680.

The previous prime is 90111179. The next prime is 90111221. The reversal of 90111203 is 30211109.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 90111203 - 2¹² = 90107107 is a prime.

It is a super-2 number, since 2×90111203² = 16240057812214418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (90111233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47018 + ... + 48896.

It is an arithmetic number, because the mean of its divisors is an integer number (3790080).

Almost surely, 2^90111203 is an apocalyptic number.

90111203 is a deficient number, since it is larger than the sum of its proper divisors (31171357).

90111203 is a wasteful number, since it uses less digits than its factorization.

90111203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 90111203 is about 9492.6920839138. The cubic root of 90111203 is about 448.3249711530.

The spelling of 90111203 in words is "ninety million, one hundred eleven thousand, two hundred three".