111890123 has 4 divisors (see below), whose sum is σ = 112998048. Its totient is φ = 110782200.

The previous prime is 111890117. The next prime is 111890153. The reversal of 111890123 is 321098111.

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 111890123 - 2¹⁸ = 111627979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111890092 and 111890101.

It is not an unprimeable number, because it can be changed into a prime (111890153) 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, 553811 + ... + 554012.

It is an arithmetic number, because the mean of its divisors is an integer number (28249512).

Almost surely, 2^111890123 is an apocalyptic number.

111890123 is a deficient number, since it is larger than the sum of its proper divisors (1107925).

111890123 is a wasteful number, since it uses less digits than its factorization.

111890123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107924.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 111890123 is about 10577.8127701335. The cubic root of 111890123 is about 481.8707707823.

The spelling of 111890123 in words is "one hundred eleven million, eight hundred ninety thousand, one hundred twenty-three".