11921684 has 6 divisors (see below), whose sum is σ = 20862954. Its totient is φ = 5960840.

The previous prime is 11921677. The next prime is 11921687. The reversal of 11921684 is 48612911.

11921684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11710084 + 211600 = 3422^2 + 460^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11921684.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11921687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1490207 + ... + 1490214.

It is an arithmetic number, because the mean of its divisors is an integer number (3477159).

Almost surely, 2^11921684 is an apocalyptic number.

It is an amenable number.

11921684 is a deficient number, since it is larger than the sum of its proper divisors (8941270).

11921684 is a wasteful number, since it uses less digits than its factorization.

11921684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980425 (or 2980423 counting only the distinct ones).

The product of its digits is 3456, while the sum is 32.

The square root of 11921684 is about 3452.7791704654. The cubic root of 11921684 is about 228.4437086317.

The spelling of 11921684 in words is "eleven million, nine hundred twenty-one thousand, six hundred eighty-four".