163699849 has 2 divisors, whose sum is σ = 163699850. Its totient is φ = 163699848.

The previous prime is 163699843. The next prime is 163699853. The reversal of 163699849 is 948996361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161925625 + 1774224 = 12725^2 + 1332^2 .

It is a cyclic number.

It is not a de Polignac number, because 163699849 - 2⁷ = 163699721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163699849.

It is not a weakly prime, because it can be changed into another prime (163699843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81849924 + 81849925.

It is an arithmetic number, because the mean of its divisors is an integer number (81849925).

Almost surely, 2^163699849 is an apocalyptic number.

It is an amenable number.

163699849 is a deficient number, since it is larger than the sum of its proper divisors (1).

163699849 is an equidigital number, since it uses as much as digits as its factorization.

163699849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 55.

The square root of 163699849 is about 12794.5241802890. The cubic root of 163699849 is about 547.0362331409.

The spelling of 163699849 in words is "one hundred sixty-three million, six hundred ninety-nine thousand, eight hundred forty-nine".