11779913 has 4 divisors (see below), whose sum is σ = 11869968. Its totient is φ = 11689860.

The previous prime is 11779909. The next prime is 11779921. The reversal of 11779913 is 31997711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31997711 = 37 ⋅864803.

It is a cyclic number.

It is not a de Polignac number, because 11779913 - 2² = 11779909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11779903) 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, 44831 + ... + 45092.

It is an arithmetic number, because the mean of its divisors is an integer number (2967492).

Almost surely, 2^11779913 is an apocalyptic number.

It is an amenable number.

11779913 is a deficient number, since it is larger than the sum of its proper divisors (90055).

11779913 is an equidigital number, since it uses as much as digits as its factorization.

11779913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90054.

The product of its digits is 11907, while the sum is 38.

The square root of 11779913 is about 3432.1877862378. The cubic root of 11779913 is about 227.5345549895.

The spelling of 11779913 in words is "eleven million, seven hundred seventy-nine thousand, nine hundred thirteen".