90100111 has 4 divisors (see below), whose sum is σ = 91577224. Its totient is φ = 88623000.

The previous prime is 90100103. The next prime is 90100123. The reversal of 90100111 is 11100109.

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 90100111 - 2³ = 90100103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90100091 and 90100100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90100141) 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, 738465 + ... + 738586.

It is an arithmetic number, because the mean of its divisors is an integer number (22894306).

Almost surely, 2^90100111 is an apocalyptic number.

90100111 is a deficient number, since it is larger than the sum of its proper divisors (1477113).

90100111 is a wasteful number, since it uses less digits than its factorization.

90100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477112.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 90100111 is about 9492.1078270319. The cubic root of 90100111 is about 448.3065752730.

The spelling of 90100111 in words is "ninety million, one hundred thousand, one hundred eleven".