90198011 has 4 divisors (see below), whose sum is σ = 90220992. Its totient is φ = 90175032.

The previous prime is 90198007. The next prime is 90198041. The reversal of 90198011 is 11089109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11089109 = 59 ⋅187951.

It is a cyclic number.

It is not a de Polignac number, because 90198011 - 2² = 90198007 is a prime.

It is a super-2 number, since 2×90198011² = 16271362376712242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90198041) 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, 3956 + ... + 14001.

It is an arithmetic number, because the mean of its divisors is an integer number (22555248).

Almost surely, 2^90198011 is an apocalyptic number.

90198011 is a deficient number, since it is larger than the sum of its proper divisors (22981).

90198011 is a wasteful number, since it uses less digits than its factorization.

90198011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22980.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 90198011 is about 9497.2633426688. The cubic root of 90198011 is about 448.4688885288.

The spelling of 90198011 in words is "ninety million, one hundred ninety-eight thousand, eleven".