11921679 has 24 divisors (see below), whose sum is σ = 21470592. Its totient is φ = 6192720.

The previous prime is 11921677. The next prime is 11921687. The reversal of 11921679 is 97612911.

It is not a de Polignac number, because 11921679 - 2¹ = 11921677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11921677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7909 + ... + 9294.

It is an arithmetic number, because the mean of its divisors is an integer number (894608).

Almost surely, 2^11921679 is an apocalyptic number.

11921679 is a deficient number, since it is larger than the sum of its proper divisors (9548913).

11921679 is a wasteful number, since it uses less digits than its factorization.

11921679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17227 (or 17224 counting only the distinct ones).

The product of its digits is 6804, while the sum is 36.

The square root of 11921679 is about 3452.7784464109. The cubic root of 11921679 is about 228.4436766950.

The spelling of 11921679 in words is "eleven million, nine hundred twenty-one thousand, six hundred seventy-nine".