111723691 has 2 divisors, whose sum is σ = 111723692. Its totient is φ = 111723690.

The previous prime is 111723649. The next prime is 111723697. The reversal of 111723691 is 196327111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111723691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111723697) 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 as a sum of consecutive naturals, namely, 55861845 + 55861846.

It is an arithmetic number, because the mean of its divisors is an integer number (55861846).

Almost surely, 2^111723691 is an apocalyptic number.

111723691 is a deficient number, since it is larger than the sum of its proper divisors (1).

111723691 is an equidigital number, since it uses as much as digits as its factorization.

111723691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 31.

The square root of 111723691 is about 10569.9428096844. The cubic root of 111723691 is about 481.6317311752.

The spelling of 111723691 in words is "one hundred eleven million, seven hundred twenty-three thousand, six hundred ninety-one".