163199997 has 6 divisors (see below), whose sum is σ = 235733342. Its totient is φ = 108799992.

The previous prime is 163199989. The next prime is 163200013. The reversal of 163199997 is 799991361.

It can be written as a sum of positive squares in only one way, i.e., 108868356 + 54331641 = 10434^2 + 7371^2 .

It is not a de Polignac number, because 163199997 - 2³ = 163199989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163199977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9066658 + ... + 9066675.

Almost surely, 2^163199997 is an apocalyptic number.

It is an amenable number.

163199997 is a deficient number, since it is larger than the sum of its proper divisors (72533345).

163199997 is a wasteful number, since it uses less digits than its factorization.

163199997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18133339 (or 18133336 counting only the distinct ones).

The product of its digits is 826686, while the sum is 54.

The square root of 163199997 is about 12774.9754207200. The cubic root of 163199997 is about 546.4788798704.

The spelling of 163199997 in words is "one hundred sixty-three million, one hundred ninety-nine thousand, nine hundred ninety-seven".