111772897 has 2 divisors, whose sum is σ = 111772898. Its totient is φ = 111772896.

The previous prime is 111772889. The next prime is 111772901. The reversal of 111772897 is 798277111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96059601 + 15713296 = 9801^2 + 3964^2 .

It is an emirp because it is prime and its reverse (798277111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111772897 - 2³ = 111772889 is a prime.

It is not a weakly prime, because it can be changed into another prime (111772097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55886448 + 55886449.

It is an arithmetic number, because the mean of its divisors is an integer number (55886449).

Almost surely, 2^111772897 is an apocalyptic number.

It is an amenable number.

111772897 is a deficient number, since it is larger than the sum of its proper divisors (1).

111772897 is an equidigital number, since it uses as much as digits as its factorization.

111772897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 43.

The square root of 111772897 is about 10572.2701914017. The cubic root of 111772897 is about 481.7024284832.

The spelling of 111772897 in words is "one hundred eleven million, seven hundred seventy-two thousand, eight hundred ninety-seven".