11979709 has 8 divisors (see below), whose sum is σ = 14411840. Its totient is φ = 9727776.

The previous prime is 11979659. The next prime is 11979719. The reversal of 11979709 is 90797911.

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

It is a cyclic number.

It is not a de Polignac number, because 11979709 - 2¹³ = 11971517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11979719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44904 + ... + 45169.

It is an arithmetic number, because the mean of its divisors is an integer number (1801480).

Almost surely, 2^11979709 is an apocalyptic number.

11979709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11979709 is a deficient number, since it is larger than the sum of its proper divisors (2432131).

11979709 is an equidigital number, since it uses as much as digits as its factorization.

11979709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90099.

The product of its (nonzero) digits is 35721, while the sum is 43.

The square root of 11979709 is about 3461.1716224423. The cubic root of 11979709 is about 228.8137346169.

The spelling of 11979709 in words is "eleven million, nine hundred seventy-nine thousand, seven hundred nine".