112991997 has 8 divisors (see below), whose sum is σ = 152349120. Its totient is φ = 74481440.

The previous prime is 112991987. The next prime is 112992007. The reversal of 112991997 is 799199211.

It is an interprime number because it is at equal distance from previous prime (112991987) and next prime (112992007).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 112991997 - 2⁶ = 112991933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112991987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211329 + ... + 211862.

It is an arithmetic number, because the mean of its divisors is an integer number (19043640).

Almost surely, 2^112991997 is an apocalyptic number.

It is an amenable number.

112991997 is a deficient number, since it is larger than the sum of its proper divisors (39357123).

112991997 is an equidigital number, since it uses as much as digits as its factorization.

112991997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423283.

The product of its digits is 91854, while the sum is 48.

The square root of 112991997 is about 10629.7693766140. The cubic root of 112991997 is about 483.4473991058.

The spelling of 112991997 in words is "one hundred twelve million, nine hundred ninety-one thousand, nine hundred ninety-seven".