111576961 has 4 divisors (see below), whose sum is σ = 112001472. Its totient is φ = 111152452.

The previous prime is 111576937. The next prime is 111576973. The reversal of 111576961 is 169675111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111576961 - 2¹¹ = 111574913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111576961.

It is not an unprimeable number, because it can be changed into a prime (111576901) 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, 211861 + ... + 212386.

It is an arithmetic number, because the mean of its divisors is an integer number (28000368).

Almost surely, 2^111576961 is an apocalyptic number.

It is an amenable number.

111576961 is a deficient number, since it is larger than the sum of its proper divisors (424511).

111576961 is an equidigital number, since it uses as much as digits as its factorization.

111576961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424510.

The product of its digits is 11340, while the sum is 37.

The square root of 111576961 is about 10562.9996213197. Note that the first 3 decimals coincide. The cubic root of 111576961 is about 481.4207917780.

The spelling of 111576961 in words is "one hundred eleven million, five hundred seventy-six thousand, nine hundred sixty-one".