11619869 has 2 divisors, whose sum is σ = 11619870. Its totient is φ = 11619868.

The previous prime is 11619841. The next prime is 11619871. The reversal of 11619869 is 96891611.

It is a happy number.

11619869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8940100 + 2679769 = 2990^2 + 1637^2 .

It is an emirp because it is prime and its reverse (96891611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11619869 is a prime.

It is a super-2 number, since 2×11619869² = 270042711154322, which contains 22 as substring.

Together with 11619871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11619889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5809934 + 5809935.

It is an arithmetic number, because the mean of its divisors is an integer number (5809935).

Almost surely, 2^11619869 is an apocalyptic number.

It is an amenable number.

11619869 is a deficient number, since it is larger than the sum of its proper divisors (1).

11619869 is an equidigital number, since it uses as much as digits as its factorization.

11619869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 41.

The square root of 11619869 is about 3408.7928948530. The cubic root of 11619869 is about 226.4994111679.

The spelling of 11619869 in words is "eleven million, six hundred nineteen thousand, eight hundred sixty-nine".