11619913 has 2 divisors, whose sum is σ = 11619914. Its totient is φ = 11619912.

The previous prime is 11619901. The next prime is 11619919. The reversal of 11619913 is 31991611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11269449 + 350464 = 3357^2 + 592^2 .

It is a cyclic number.

It is not a de Polignac number, because 11619913 - 2²¹ = 9522761 is a prime.

It is not a weakly prime, because it can be changed into another prime (11619919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5809956 + 5809957.

It is an arithmetic number, because the mean of its divisors is an integer number (5809957).

Almost surely, 2^11619913 is an apocalyptic number.

It is an amenable number.

11619913 is a deficient number, since it is larger than the sum of its proper divisors (1).

11619913 is an equidigital number, since it uses as much as digits as its factorization.

11619913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 31.

The square root of 11619913 is about 3408.7993487444. The cubic root of 11619913 is about 226.4996970564.

The spelling of 11619913 in words is "eleven million, six hundred nineteen thousand, nine hundred thirteen".