161803799 has 2 divisors, whose sum is σ = 161803800. Its totient is φ = 161803798.

The previous prime is 161803793. The next prime is 161803819. The reversal of 161803799 is 997308161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161803799 - 2¹⁶ = 161738263 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161803793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80901899 + 80901900.

It is an arithmetic number, because the mean of its divisors is an integer number (80901900).

Almost surely, 2^161803799 is an apocalyptic number.

161803799 is a deficient number, since it is larger than the sum of its proper divisors (1).

161803799 is an equidigital number, since it uses as much as digits as its factorization.

161803799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 161803799 is about 12720.2122230724. The cubic root of 161803799 is about 544.9160143287.

The spelling of 161803799 in words is "one hundred sixty-one million, eight hundred three thousand, seven hundred ninety-nine".