111720973 has 8 divisors (see below), whose sum is σ = 137502848. Its totient is φ = 88394544.

The previous prime is 111720971. The next prime is 111720977. The reversal of 111720973 is 379027111.

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

It is not a de Polignac number, because 111720973 - 2¹ = 111720971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111720971) 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, 613761 + ... + 613942.

It is an arithmetic number, because the mean of its divisors is an integer number (17187856).

Almost surely, 2^111720973 is an apocalyptic number.

111720973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

111720973 is a deficient number, since it is larger than the sum of its proper divisors (25781875).

111720973 is a wasteful number, since it uses less digits than its factorization.

111720973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227723.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 111720973 is about 10569.8142367782. The cubic root of 111720973 is about 481.6278254513.

The spelling of 111720973 in words is "one hundred eleven million, seven hundred twenty thousand, nine hundred seventy-three".