111743897 has 2 divisors, whose sum is σ = 111743898. Its totient is φ = 111743896.

The previous prime is 111743881. The next prime is 111743899. The reversal of 111743897 is 798347111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107827456 + 3916441 = 10384^2 + 1979^2 .

It is a cyclic number.

It is not a de Polignac number, because 111743897 - 2⁴ = 111743881 is a prime.

Together with 111743899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111743899) 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, 55871948 + 55871949.

It is an arithmetic number, because the mean of its divisors is an integer number (55871949).

Almost surely, 2^111743897 is an apocalyptic number.

It is an amenable number.

111743897 is a deficient number, since it is larger than the sum of its proper divisors (1).

111743897 is an equidigital number, since it uses as much as digits as its factorization.

111743897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 41.

The square root of 111743897 is about 10570.8985899970. The cubic root of 111743897 is about 481.6607648983.

The spelling of 111743897 in words is "one hundred eleven million, seven hundred forty-three thousand, eight hundred ninety-seven".