163950569 has 2 divisors, whose sum is σ = 163950570. Its totient is φ = 163950568.

The previous prime is 163950551. The next prime is 163950583. The reversal of 163950569 is 965059361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139546969 + 24403600 = 11813^2 + 4940^2 .

It is a cyclic number.

It is not a de Polignac number, because 163950569 - 2²⁴ = 147173353 is a prime.

It is a super-2 number, since 2×163950569² = 53759578150847522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163950769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81975284 + 81975285.

It is an arithmetic number, because the mean of its divisors is an integer number (81975285).

Almost surely, 2^163950569 is an apocalyptic number.

It is an amenable number.

163950569 is a deficient number, since it is larger than the sum of its proper divisors (1).

163950569 is an equidigital number, since it uses as much as digits as its factorization.

163950569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 163950569 is about 12804.3183731115. The cubic root of 163950569 is about 547.3153679199.

The spelling of 163950569 in words is "one hundred sixty-three million, nine hundred fifty thousand, five hundred sixty-nine".