11617891 has 2 divisors, whose sum is σ = 11617892. Its totient is φ = 11617890.

The previous prime is 11617849. The next prime is 11617897. The reversal of 11617891 is 19871611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11617891 - 2¹¹ = 11615843 is a prime.

It is not a weakly prime, because it can be changed into another prime (11617897) 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, 5808945 + 5808946.

It is an arithmetic number, because the mean of its divisors is an integer number (5808946).

Almost surely, 2^11617891 is an apocalyptic number.

11617891 is a deficient number, since it is larger than the sum of its proper divisors (1).

11617891 is an equidigital number, since it uses as much as digits as its factorization.

11617891 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 11617891 is about 3408.5027504756. The cubic root of 11617891 is about 226.4865584338.

The spelling of 11617891 in words is "eleven million, six hundred seventeen thousand, eight hundred ninety-one".