163928069 has 2 divisors, whose sum is σ = 163928070. Its totient is φ = 163928068.

The previous prime is 163928027. The next prime is 163928077. The reversal of 163928069 is 960829361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148230625 + 15697444 = 12175^2 + 3962^2 .

It is a cyclic number.

It is not a de Polignac number, because 163928069 - 2²⁴ = 147150853 is a prime.

It is a super-2 number, since 2×163928069² = 53744823612137522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163928269) 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, 81964034 + 81964035.

It is an arithmetic number, because the mean of its divisors is an integer number (81964035).

Almost surely, 2^163928069 is an apocalyptic number.

It is an amenable number.

163928069 is a deficient number, since it is larger than the sum of its proper divisors (1).

163928069 is an equidigital number, since it uses as much as digits as its factorization.

163928069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 163928069 is about 12803.4397331342. The cubic root of 163928069 is about 547.2903295618.

The spelling of 163928069 in words is "one hundred sixty-three million, nine hundred twenty-eight thousand, sixty-nine".