111980997 has 48 divisors (see below), whose sum is σ = 175893120. Its totient is φ = 68475264.

The previous prime is 111980983. The next prime is 111981007. The reversal of 111980997 is 799089111.

It is not a de Polignac number, because 111980997 - 2⁸ = 111980741 is a prime.

It is a super-2 number, since 2×111980997² = 25079487378228018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111980917) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 647203 + ... + 647375.

It is an arithmetic number, because the mean of its divisors is an integer number (3664440).

Almost surely, 2^111980997 is an apocalyptic number.

It is an amenable number.

111980997 is a deficient number, since it is larger than the sum of its proper divisors (63912123).

111980997 is a wasteful number, since it uses less digits than its factorization.

111980997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 45.

The square root of 111980997 is about 10582.1073988124. The cubic root of 111980997 is about 482.0011894279.

The spelling of 111980997 in words is "one hundred eleven million, nine hundred eighty thousand, nine hundred ninety-seven".