113720509 has 8 divisors (see below), whose sum is σ = 132989120. Its totient is φ = 95207616.

The previous prime is 113720501. The next prime is 113720521. The reversal of 113720509 is 905027311.

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

It is not a de Polignac number, because 113720509 - 2³ = 113720501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113720501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188604 + ... + 189205.

It is an arithmetic number, because the mean of its divisors is an integer number (16623640).

Almost surely, 2^113720509 is an apocalyptic number.

It is an amenable number.

113720509 is a deficient number, since it is larger than the sum of its proper divisors (19268611).

113720509 is an equidigital number, since it uses as much as digits as its factorization.

113720509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377859.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 113720509 is about 10663.9818548233. The cubic root of 113720509 is about 484.4841775624.

The spelling of 113720509 in words is "one hundred thirteen million, seven hundred twenty thousand, five hundred nine".