111945982 has 4 divisors (see below), whose sum is σ = 167918976. Its totient is φ = 55972990.

The previous prime is 111945961. The next prime is 111945989. The reversal of 111945982 is 289549111.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111945989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27986494 + ... + 27986497.

It is an arithmetic number, because the mean of its divisors is an integer number (41979744).

Almost surely, 2^111945982 is an apocalyptic number.

111945982 is a deficient number, since it is larger than the sum of its proper divisors (55972994).

111945982 is an equidigital number, since it uses as much as digits as its factorization.

111945982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55972993.

The product of its digits is 25920, while the sum is 40.

The square root of 111945982 is about 10580.4528258482. The cubic root of 111945982 is about 481.9509456916.

The spelling of 111945982 in words is "one hundred eleven million, nine hundred forty-five thousand, nine hundred eighty-two".