12091923 has 36 divisors (see below), whose sum is σ = 19288360. Its totient is φ = 7558272.

The previous prime is 12091907. The next prime is 12091943. The reversal of 12091923 is 32919021.

It is not a de Polignac number, because 12091923 - 2⁴ = 12091907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12091903) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 124611 + ... + 124707.

Almost surely, 2^12091923 is an apocalyptic number.

12091923 is a deficient number, since it is larger than the sum of its proper divisors (7196437).

12091923 is an frugal number, since it uses more digits than its factorization.

12091923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 12091923 is about 3477.3442452538. The cubic root of 12091923 is about 229.5259486231.

The spelling of 12091923 in words is "twelve million, ninety-one thousand, nine hundred twenty-three".