111994947 has 8 divisors (see below), whose sum is σ = 165918480. Its totient is φ = 74663280.

The previous prime is 111994943. The next prime is 111994979. The reversal of 111994947 is 749499111.

It is not a de Polignac number, because 111994947 - 2² = 111994943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111994943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2073954 + ... + 2074007.

It is an arithmetic number, because the mean of its divisors is an integer number (20739810).

Almost surely, 2^111994947 is an apocalyptic number.

111994947 is a deficient number, since it is larger than the sum of its proper divisors (53923533).

111994947 is an equidigital number, since it uses as much as digits as its factorization.

111994947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4147970 (or 4147964 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 111994947 is about 10582.7665097554. The cubic root of 111994947 is about 482.0212036493.

The spelling of 111994947 in words is "one hundred eleven million, nine hundred ninety-four thousand, nine hundred forty-seven".