16811959 has 2 divisors, whose sum is σ = 16811960. Its totient is φ = 16811958.

The previous prime is 16811957. The next prime is 16811987. The reversal of 16811959 is 95911861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16811959 - 2¹ = 16811957 is a prime.

Together with 16811957, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16811957) 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, 8405979 + 8405980.

It is an arithmetic number, because the mean of its divisors is an integer number (8405980).

Almost surely, 2^16811959 is an apocalyptic number.

16811959 is a deficient number, since it is larger than the sum of its proper divisors (1).

16811959 is an equidigital number, since it uses as much as digits as its factorization.

16811959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 40.

The square root of 16811959 is about 4100.2388954791. The cubic root of 16811959 is about 256.1765901952.

The spelling of 16811959 in words is "sixteen million, eight hundred eleven thousand, nine hundred fifty-nine".