11421979 has 8 divisors (see below), whose sum is σ = 11617632. Its totient is φ = 11228160.

The previous prime is 11421973. The next prime is 11422013. The reversal of 11421979 is 97912411.

11421979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11421979 - 2⁵ = 11421947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11421973) 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, 17499 + ... + 18139.

It is an arithmetic number, because the mean of its divisors is an integer number (1452204).

Almost surely, 2^11421979 is an apocalyptic number.

11421979 is a deficient number, since it is larger than the sum of its proper divisors (195653).

11421979 is a wasteful number, since it uses less digits than its factorization.

11421979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917.

The product of its digits is 4536, while the sum is 34.

The square root of 11421979 is about 3379.6418449297. The cubic root of 11421979 is about 225.2062569575.

The spelling of 11421979 in words is "eleven million, four hundred twenty-one thousand, nine hundred seventy-nine".