113972309 has 4 divisors (see below), whose sum is σ = 124333440. Its totient is φ = 103611180.

The previous prime is 113972303. The next prime is 113972311. The reversal of 113972309 is 903279311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113972309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113972303) 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 in 3 ways as a sum of consecutive naturals, for example, 5180549 + ... + 5180570.

It is an arithmetic number, because the mean of its divisors is an integer number (31083360).

Almost surely, 2^113972309 is an apocalyptic number.

It is an amenable number.

113972309 is a deficient number, since it is larger than the sum of its proper divisors (10361131).

113972309 is a wasteful number, since it uses less digits than its factorization.

113972309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10361130.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 113972309 is about 10675.7814233900. The cubic root of 113972309 is about 484.8414956589.

The spelling of 113972309 in words is "one hundred thirteen million, nine hundred seventy-two thousand, three hundred nine".