163785733 has 2 divisors, whose sum is σ = 163785734. Its totient is φ = 163785732.

The previous prime is 163785709. The next prime is 163785749. The reversal of 163785733 is 337587361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160224964 + 3560769 = 12658^2 + 1887^2 .

It is an emirp because it is prime and its reverse (337587361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163785733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163785733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163785233) 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, 81892866 + 81892867.

It is an arithmetic number, because the mean of its divisors is an integer number (81892867).

Almost surely, 2^163785733 is an apocalyptic number.

It is an amenable number.

163785733 is a deficient number, since it is larger than the sum of its proper divisors (1).

163785733 is an equidigital number, since it uses as much as digits as its factorization.

163785733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 43.

The square root of 163785733 is about 12797.8800197533. The cubic root of 163785733 is about 547.1318826815.

The spelling of 163785733 in words is "one hundred sixty-three million, seven hundred eighty-five thousand, seven hundred thirty-three".