11979854 has 8 divisors (see below), whose sum is σ = 18099480. Its totient is φ = 5946696.

The previous prime is 11979853. The next prime is 11979889. The reversal of 11979854 is 45897911.

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

It is a super-2 number, since 2×11979854² = 287033803722632, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11979853) 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, 21269 + ... + 21824.

It is an arithmetic number, because the mean of its divisors is an integer number (2262435).

Almost surely, 2^11979854 is an apocalyptic number.

11979854 is a deficient number, since it is larger than the sum of its proper divisors (6119626).

11979854 is a wasteful number, since it uses less digits than its factorization.

11979854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43234.

The product of its digits is 90720, while the sum is 44.

The square root of 11979854 is about 3461.1925690432. The cubic root of 11979854 is about 228.8146577851.

The spelling of 11979854 in words is "eleven million, nine hundred seventy-nine thousand, eight hundred fifty-four".