11924391 has 4 divisors (see below), whose sum is σ = 15899192. Its totient is φ = 7949592.

The previous prime is 11924389. The next prime is 11924449. The reversal of 11924391 is 19342911.

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

It is not a de Polignac number, because 11924391 - 2¹ = 11924389 is a prime.

It is a super-2 number, since 2×11924391² = 284382201441762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11924351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1987396 + ... + 1987401.

It is an arithmetic number, because the mean of its divisors is an integer number (3974798).

Almost surely, 2^11924391 is an apocalyptic number.

11924391 is a deficient number, since it is larger than the sum of its proper divisors (3974801).

11924391 is an equidigital number, since it uses as much as digits as its factorization.

11924391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974800.

The product of its digits is 1944, while the sum is 30.

The square root of 11924391 is about 3453.1711512753. The cubic root of 11924391 is about 228.4609978648.

The spelling of 11924391 in words is "eleven million, nine hundred twenty-four thousand, three hundred ninety-one".