115665623 has 4 divisors (see below), whose sum is σ = 115731648. Its totient is φ = 115599600.

The previous prime is 115665611. The next prime is 115665629. The reversal of 115665623 is 326566511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326566511 = 1459 ⋅223829.

It is a cyclic number.

It is not a de Polignac number, because 115665623 - 2⁴ = 115665607 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 (115665629) 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 3 ways as a sum of consecutive naturals, for example, 30311 + ... + 33912.

It is an arithmetic number, because the mean of its divisors is an integer number (28932912).

Almost surely, 2^115665623 is an apocalyptic number.

115665623 is a deficient number, since it is larger than the sum of its proper divisors (66025).

115665623 is an equidigital number, since it uses as much as digits as its factorization.

115665623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66024.

The product of its digits is 32400, while the sum is 35.

The square root of 115665623 is about 10754.7953490524. The cubic root of 115665623 is about 487.2308369942.

The spelling of 115665623 in words is "one hundred fifteen million, six hundred sixty-five thousand, six hundred twenty-three".