11721379 has 8 divisors (see below), whose sum is σ = 12172160. Its totient is φ = 11275200.

The previous prime is 11721373. The next prime is 11721397. The reversal of 11721379 is 97312711.

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 11721379 - 2³ = 11721371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11721379.

It is not an unprimeable number, because it can be changed into a prime (11721371) 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 7 ways as a sum of consecutive naturals, for example, 4567 + ... + 6655.

It is an arithmetic number, because the mean of its divisors is an integer number (1521520).

Almost surely, 2^11721379 is an apocalyptic number.

11721379 is a deficient number, since it is larger than the sum of its proper divisors (450781).

11721379 is a wasteful number, since it uses less digits than its factorization.

11721379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301.

The product of its digits is 2646, while the sum is 31.

The square root of 11721379 is about 3423.6499529011. The cubic root of 11721379 is about 227.1570584697.

It can be divided in two parts, 11721 and 379, that added together give a square (12100 = 110²).

The spelling of 11721379 in words is "eleven million, seven hundred twenty-one thousand, three hundred seventy-nine".