113551609 has 2 divisors, whose sum is σ = 113551610. Its totient is φ = 113551608.

The previous prime is 113551597. The next prime is 113551637. The reversal of 113551609 is 906155311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 41641209 = 8480^2 + 6453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113551609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (113551639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56775804 + 56775805.

It is an arithmetic number, because the mean of its divisors is an integer number (56775805).

Almost surely, 2^113551609 is an apocalyptic number.

It is an amenable number.

113551609 is a deficient number, since it is larger than the sum of its proper divisors (1).

113551609 is an equidigital number, since it uses as much as digits as its factorization.

113551609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 113551609 is about 10656.0597314392. The cubic root of 113551609 is about 484.2442034852.

The spelling of 113551609 in words is "one hundred thirteen million, five hundred fifty-one thousand, six hundred nine".