111731117 has 2 divisors, whose sum is σ = 111731118. Its totient is φ = 111731116.

The previous prime is 111731069. The next prime is 111731131. The reversal of 111731117 is 711137111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108451396 + 3279721 = 10414^2 + 1811^2 .

It is a cyclic number.

It is not a de Polignac number, because 111731117 - 2¹⁶ = 111665581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111731092 and 111731101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111731017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55865558 + 55865559.

It is an arithmetic number, because the mean of its divisors is an integer number (55865559).

Almost surely, 2^111731117 is an apocalyptic number.

It is an amenable number.

111731117 is a deficient number, since it is larger than the sum of its proper divisors (1).

111731117 is an equidigital number, since it uses as much as digits as its factorization.

111731117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147, while the sum is 23.

The square root of 111731117 is about 10570.2940829477. The cubic root of 111731117 is about 481.6424018991.

Adding to 111731117 its reverse (711137111), we get a palindrome (822868228).

The spelling of 111731117 in words is "one hundred eleven million, seven hundred thirty-one thousand, one hundred seventeen".