111619897 has 4 divisors (see below), whose sum is σ = 116472960. Its totient is φ = 106766836.

The previous prime is 111619891. The next prime is 111619901. The reversal of 111619897 is 798916111.

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 111619897 - 2⁷ = 111619769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111619891) 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, 2426497 + ... + 2426542.

It is an arithmetic number, because the mean of its divisors is an integer number (29118240).

Almost surely, 2^111619897 is an apocalyptic number.

It is an amenable number.

111619897 is a deficient number, since it is larger than the sum of its proper divisors (4853063).

111619897 is an equidigital number, since it uses as much as digits as its factorization.

111619897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853062.

The product of its digits is 27216, while the sum is 43.

The square root of 111619897 is about 10565.0318030757. The cubic root of 111619897 is about 481.4825358039.

The spelling of 111619897 in words is "one hundred eleven million, six hundred nineteen thousand, eight hundred ninety-seven".