111967998 has 8 divisors (see below), whose sum is σ = 223936008. Its totient is φ = 37322664.

The previous prime is 111967997. The next prime is 111968009. The reversal of 111967998 is 899769111.

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

111967998 is an admirable number.

It is a super-2 number, since 2×111967998² = 25073665152256008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111967998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111967997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9330661 + ... + 9330672.

It is an arithmetic number, because the mean of its divisors is an integer number (27992001).

Almost surely, 2^111967998 is an apocalyptic number.

111967998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111967998 is a wasteful number, since it uses less digits than its factorization.

111967998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18661338.

The product of its digits is 244944, while the sum is 51.

The square root of 111967998 is about 10581.4931838564. The cubic root of 111967998 is about 481.9825381207.

The spelling of 111967998 in words is "one hundred eleven million, nine hundred sixty-seven thousand, nine hundred ninety-eight".