11999679 has 4 divisors (see below), whose sum is σ = 15999576. Its totient is φ = 7999784.

The previous prime is 11999657. The next prime is 11999681. The reversal of 11999679 is 97699911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97699911 = 3 ⋅32566637.

It is a cyclic number.

It is not a de Polignac number, because 11999679 - 2⁷ = 11999551 is a prime.

It is a super-2 number, since 2×11999679² = 287984592206082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11999699) 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, 1999944 + ... + 1999949.

It is an arithmetic number, because the mean of its divisors is an integer number (3999894).

Almost surely, 2^11999679 is an apocalyptic number.

11999679 is a deficient number, since it is larger than the sum of its proper divisors (3999897).

11999679 is an equidigital number, since it uses as much as digits as its factorization.

11999679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999896.

The product of its digits is 275562, while the sum is 51.

The square root of 11999679 is about 3464.0552824688. The cubic root of 11999679 is about 228.9408070854.

It can be divided in two parts, 1199 and 9679, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 11999679 in words is "eleven million, nine hundred ninety-nine thousand, six hundred seventy-nine".