163973773 has 2 divisors, whose sum is σ = 163973774. Its totient is φ = 163973772.

The previous prime is 163973767. The next prime is 163973779. The reversal of 163973773 is 377379361.

It is a balanced prime because it is at equal distance from previous prime (163973767) and next prime (163973779).

It can be written as a sum of positive squares in only one way, i.e., 96766569 + 67207204 = 9837^2 + 8198^2 .

It is an emirp because it is prime and its reverse (377379361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163973773 - 2⁹ = 163973261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163973779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81986886 + 81986887.

It is an arithmetic number, because the mean of its divisors is an integer number (81986887).

Almost surely, 2^163973773 is an apocalyptic number.

It is an amenable number.

163973773 is a deficient number, since it is larger than the sum of its proper divisors (1).

163973773 is an equidigital number, since it uses as much as digits as its factorization.

163973773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500094, while the sum is 46.

The square root of 163973773 is about 12805.2244416098. The cubic root of 163973773 is about 547.3411873011.

The spelling of 163973773 in words is "one hundred sixty-three million, nine hundred seventy-three thousand, seven hundred seventy-three".