11421913 has 2 divisors, whose sum is σ = 11421914. Its totient is φ = 11421912.

The previous prime is 11421901. The next prime is 11421947. The reversal of 11421913 is 31912411.

11421913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11370384 + 51529 = 3372^2 + 227^2 .

It is an emirp because it is prime and its reverse (31912411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11421913 - 2⁹ = 11421401 is a prime.

It is not a weakly prime, because it can be changed into another prime (11421953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710956 + 5710957.

It is an arithmetic number, because the mean of its divisors is an integer number (5710957).

Almost surely, 2^11421913 is an apocalyptic number.

It is an amenable number.

11421913 is a deficient number, since it is larger than the sum of its proper divisors (1).

11421913 is an equidigital number, since it uses as much as digits as its factorization.

11421913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 22.

The square root of 11421913 is about 3379.6320805674. The cubic root of 11421913 is about 225.2058231844.

The spelling of 11421913 in words is "eleven million, four hundred twenty-one thousand, nine hundred thirteen".