113243609 has 2 divisors, whose sum is σ = 113243610. Its totient is φ = 113243608.

The previous prime is 113243593. The next prime is 113243617. The reversal of 113243609 is 906342311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97219600 + 16024009 = 9860^2 + 4003^2 .

It is a cyclic number.

It is not a de Polignac number, because 113243609 - 2⁴ = 113243593 is a prime.

It is a super-2 number, since 2×113243609² = 25648229958689762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (113243909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56621804 + 56621805.

It is an arithmetic number, because the mean of its divisors is an integer number (56621805).

Almost surely, 2^113243609 is an apocalyptic number.

It is an amenable number.

113243609 is a deficient number, since it is larger than the sum of its proper divisors (1).

113243609 is an equidigital number, since it uses as much as digits as its factorization.

113243609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 113243609 is about 10641.5980472859. The cubic root of 113243609 is about 483.8059819879.

The spelling of 113243609 in words is "one hundred thirteen million, two hundred forty-three thousand, six hundred nine".