111818137 has 2 divisors, whose sum is σ = 111818138. Its totient is φ = 111818136.

The previous prime is 111818131. The next prime is 111818141. The reversal of 111818137 is 731818111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71419401 + 40398736 = 8451^2 + 6356^2 .

It is an emirp because it is prime and its reverse (731818111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111818137 - 2¹⁵ = 111785369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111818099 and 111818108.

It is not a weakly prime, because it can be changed into another prime (111818131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55909068 + 55909069.

It is an arithmetic number, because the mean of its divisors is an integer number (55909069).

Almost surely, 2^111818137 is an apocalyptic number.

It is an amenable number.

111818137 is a deficient number, since it is larger than the sum of its proper divisors (1).

111818137 is an equidigital number, since it uses as much as digits as its factorization.

111818137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 31.

The square root of 111818137 is about 10574.4095343428. The cubic root of 111818137 is about 481.7674092879.

The spelling of 111818137 in words is "one hundred eleven million, eight hundred eighteen thousand, one hundred thirty-seven".