11917923 has 8 divisors (see below), whose sum is σ = 16260288. Its totient is φ = 7760424.

The previous prime is 11917891. The next prime is 11917937. The reversal of 11917923 is 32971911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11917923 - 2⁵ = 11917891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11917963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46065 + ... + 46322.

It is an arithmetic number, because the mean of its divisors is an integer number (2032536).

Almost surely, 2^11917923 is an apocalyptic number.

11917923 is a deficient number, since it is larger than the sum of its proper divisors (4342365).

11917923 is an equidigital number, since it uses as much as digits as its factorization.

11917923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92433.

The product of its digits is 3402, while the sum is 33.

The square root of 11917923 is about 3452.2344937736. The cubic root of 11917923 is about 228.4196833024.

Subtracting from 11917923 its product of digits (3402), we obtain a triangular number (11914521 = T₄₈₈₁).

The spelling of 11917923 in words is "eleven million, nine hundred seventeen thousand, nine hundred twenty-three".