111977 has 2 divisors, whose sum is σ = 111978. Its totient is φ = 111976.

The previous prime is 111973. The next prime is 111997. The reversal of 111977 is 779111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59536 + 52441 = 244^2 + 229^2 .

It is an emirp because it is prime and its reverse (779111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111977 - 2² = 111973 is a prime.

It is a plaindrome in base 6.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55988 + 55989.

It is an arithmetic number, because the mean of its divisors is an integer number (55989).

2¹¹¹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

111977 is a deficient number, since it is larger than the sum of its proper divisors (1).

111977 is an equidigital number, since it uses as much as digits as its factorization.

111977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 441, while the sum is 26.

The square root of 111977 is about 334.6296460268. The cubic root of 111977 is about 48.1995454581.

The spelling of 111977 in words is "one hundred eleven thousand, nine hundred seventy-seven".