111808897 has 2 divisors, whose sum is σ = 111808898. Its totient is φ = 111808896.

The previous prime is 111808889. The next prime is 111808903. The reversal of 111808897 is 798808111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77422401 + 34386496 = 8799^2 + 5864^2 .

It is a cyclic number.

It is not a de Polignac number, because 111808897 - 2³ = 111808889 is a prime.

It is not a weakly prime, because it can be changed into another prime (111808877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55904448 + 55904449.

It is an arithmetic number, because the mean of its divisors is an integer number (55904449).

Almost surely, 2^111808897 is an apocalyptic number.

It is an amenable number.

111808897 is a deficient number, since it is larger than the sum of its proper divisors (1).

111808897 is an equidigital number, since it uses as much as digits as its factorization.

111808897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 43.

The square root of 111808897 is about 10573.9726214890. The cubic root of 111808897 is about 481.7541387709.

It can be divided in two parts, 11180 and 8897, that multiplied together give a triangular number (99468460 = T₁₄₁₀₄).

The spelling of 111808897 in words is "one hundred eleven million, eight hundred eight thousand, eight hundred ninety-seven".