112891997 has 2 divisors, whose sum is σ = 112891998. Its totient is φ = 112891996.

The previous prime is 112891969. The next prime is 112892051. The reversal of 112891997 is 799198211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85914361 + 26977636 = 9269^2 + 5194^2 .

It is a cyclic number.

It is not a de Polignac number, because 112891997 - 2²⁰ = 111843421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112891897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56445998 + 56445999.

It is an arithmetic number, because the mean of its divisors is an integer number (56445999).

Almost surely, 2^112891997 is an apocalyptic number.

It is an amenable number.

112891997 is a deficient number, since it is larger than the sum of its proper divisors (1).

112891997 is an equidigital number, since it uses as much as digits as its factorization.

112891997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 47.

The square root of 112891997 is about 10625.0645645097. The cubic root of 112891997 is about 483.3047370583.

The spelling of 112891997 in words is "one hundred twelve million, eight hundred ninety-one thousand, nine hundred ninety-seven".