11915923 has 4 divisors (see below), whose sum is σ = 12111328. Its totient is φ = 11720520.

The previous prime is 11915903. The next prime is 11915927. The reversal of 11915923 is 32951911.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11915923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11915927) 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, 97611 + ... + 97732.

It is an arithmetic number, because the mean of its divisors is an integer number (3027832).

Almost surely, 2^11915923 is an apocalyptic number.

11915923 is a deficient number, since it is larger than the sum of its proper divisors (195405).

11915923 is an equidigital number, since it uses as much as digits as its factorization.

11915923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195404.

The product of its digits is 2430, while the sum is 31.

The square root of 11915923 is about 3451.9448141591. The cubic root of 11915923 is about 228.4069052111.

The spelling of 11915923 in words is "eleven million, nine hundred fifteen thousand, nine hundred twenty-three".