11921678 has 8 divisors (see below), whose sum is σ = 17959968. Its totient is φ = 5935024.

The previous prime is 11921677. The next prime is 11921687. The reversal of 11921678 is 87612911.

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

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12326 + ... + 13257.

It is an arithmetic number, because the mean of its divisors is an integer number (2244996).

Almost surely, 2^11921678 is an apocalyptic number.

11921678 is a deficient number, since it is larger than the sum of its proper divisors (6038290).

11921678 is a wasteful number, since it uses less digits than its factorization.

11921678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25818.

The product of its digits is 6048, while the sum is 35.

The square root of 11921678 is about 3452.7783016000. The cubic root of 11921678 is about 228.4436703077.

The spelling of 11921678 in words is "eleven million, nine hundred twenty-one thousand, six hundred seventy-eight".