11871619 has 2 divisors, whose sum is σ = 11871620. Its totient is φ = 11871618.

The previous prime is 11871617. The next prime is 11871647. The reversal of 11871619 is 91617811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11871619 - 2¹ = 11871617 is a prime.

It is a super-2 number, since 2×11871619² = 281870675362322, which contains 22 as substring.

Together with 11871617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11871617) 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, 5935809 + 5935810.

It is an arithmetic number, because the mean of its divisors is an integer number (5935810).

Almost surely, 2^11871619 is an apocalyptic number.

11871619 is a deficient number, since it is larger than the sum of its proper divisors (1).

11871619 is an equidigital number, since it uses as much as digits as its factorization.

11871619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 34.

The square root of 11871619 is about 3445.5215860592. The cubic root of 11871619 is about 228.1234775403.

The spelling of 11871619 in words is "eleven million, eight hundred seventy-one thousand, six hundred nineteen".