111973 has 2 divisors, whose sum is σ = 111974. Its totient is φ = 111972.

The previous prime is 111959. The next prime is 111977. The reversal of 111973 is 379111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91809 + 20164 = 303^2 + 142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111973 is a prime.

It is a nialpdrome in base 6 and base 7.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55986 + 55987.

It is an arithmetic number, because the mean of its divisors is an integer number (55987).

2¹¹¹⁹⁷³ is an apocalyptic number.

It is an amenable number.

111973 is a deficient number, since it is larger than the sum of its proper divisors (1).

111973 is an equidigital number, since it uses as much as digits as its factorization.

111973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189, while the sum is 22.

The square root of 111973 is about 334.6236692166. The cubic root of 111973 is about 48.1989715293.

The spelling of 111973 in words is "one hundred eleven thousand, nine hundred seventy-three".