17980811 has 2 divisors, whose sum is σ = 17980812. Its totient is φ = 17980810.

The previous prime is 17980801. The next prime is 17980819. The reversal of 17980811 is 11808971.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17980811 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (17980819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8990405 + 8990406.

It is an arithmetic number, because the mean of its divisors is an integer number (8990406).

Almost surely, 2^17980811 is an apocalyptic number.

17980811 is a deficient number, since it is larger than the sum of its proper divisors (1).

17980811 is an equidigital number, since it uses as much as digits as its factorization.

17980811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 17980811 is about 4240.3786387539. The cubic root of 17980811 is about 261.9809777771.

The spelling of 17980811 in words is "seventeen million, nine hundred eighty thousand, eight hundred eleven".