111620809 has 8 divisors (see below), whose sum is σ = 113892480. Its totient is φ = 109355376.

The previous prime is 111620779. The next prime is 111620833. The reversal of 111620809 is 908026111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111620809 - 2⁹ = 111620297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111629809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54054 + ... + 56080.

It is an arithmetic number, because the mean of its divisors is an integer number (14236560).

Almost surely, 2^111620809 is an apocalyptic number.

It is an amenable number.

111620809 is a deficient number, since it is larger than the sum of its proper divisors (2271671).

111620809 is a wasteful number, since it uses less digits than its factorization.

111620809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 111620809 is about 10565.0749642395. The cubic root of 111620809 is about 481.4838471318.

The spelling of 111620809 in words is "one hundred eleven million, six hundred twenty thousand, eight hundred nine".