16613791 has 2 divisors, whose sum is σ = 16613792. Its totient is φ = 16613790.

The previous prime is 16613761. The next prime is 16613803. The reversal of 16613791 is 19731661.

It is a strong prime.

It is an emirp because it is prime and its reverse (19731661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16613791 - 2¹³ = 16605599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16613711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8306895 + 8306896.

It is an arithmetic number, because the mean of its divisors is an integer number (8306896).

Almost surely, 2^16613791 is an apocalyptic number.

16613791 is a deficient number, since it is larger than the sum of its proper divisors (1).

16613791 is an equidigital number, since it uses as much as digits as its factorization.

16613791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The square root of 16613791 is about 4076.0018400388. The cubic root of 16613791 is about 255.1660638158.

The spelling of 16613791 in words is "sixteen million, six hundred thirteen thousand, seven hundred ninety-one".