111788857 has 2 divisors, whose sum is σ = 111788858. Its totient is φ = 111788856.

The previous prime is 111788851. The next prime is 111788879. The reversal of 111788857 is 758887111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89472681 + 22316176 = 9459^2 + 4724^2 .

It is an emirp because it is prime and its reverse (758887111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111788857 is a prime.

It is not a weakly prime, because it can be changed into another prime (111788851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55894428 + 55894429.

It is an arithmetic number, because the mean of its divisors is an integer number (55894429).

Almost surely, 2^111788857 is an apocalyptic number.

It is an amenable number.

111788857 is a deficient number, since it is larger than the sum of its proper divisors (1).

111788857 is an equidigital number, since it uses as much as digits as its factorization.

111788857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125440, while the sum is 46.

The square root of 111788857 is about 10573.0249692318. The cubic root of 111788857 is about 481.7253547473.

The spelling of 111788857 in words is "one hundred eleven million, seven hundred eighty-eight thousand, eight hundred fifty-seven".