112431989 has 2 divisors, whose sum is σ = 112431990. Its totient is φ = 112431988.

The previous prime is 112431941. The next prime is 112431997. The reversal of 112431989 is 989134211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89151364 + 23280625 = 9442^2 + 4825^2 .

It is a cyclic number.

It is not a de Polignac number, because 112431989 - 2²⁴ = 95654773 is a prime.

It is a super-2 number, since 2×112431989² = 25281904300992242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112437989) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56215994 + 56215995.

It is an arithmetic number, because the mean of its divisors is an integer number (56215995).

Almost surely, 2^112431989 is an apocalyptic number.

It is an amenable number.

112431989 is a deficient number, since it is larger than the sum of its proper divisors (1).

112431989 is an equidigital number, since it uses as much as digits as its factorization.

112431989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 112431989 is about 10603.3951638143. The cubic root of 112431989 is about 482.6473928433.

The spelling of 112431989 in words is "one hundred twelve million, four hundred thirty-one thousand, nine hundred eighty-nine".