163940269 has 2 divisors, whose sum is σ = 163940270. Its totient is φ = 163940268.

The previous prime is 163940267. The next prime is 163940279. The reversal of 163940269 is 962049361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97713225 + 66227044 = 9885^2 + 8138^2 .

It is a cyclic number.

It is not a de Polignac number, because 163940269 - 2¹ = 163940267 is a prime.

It is a super-2 number, since 2×163940269² = 53752823599584722, which contains 22 as substring.

Together with 163940267, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163940267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81970134 + 81970135.

It is an arithmetic number, because the mean of its divisors is an integer number (81970135).

Almost surely, 2^163940269 is an apocalyptic number.

It is an amenable number.

163940269 is a deficient number, since it is larger than the sum of its proper divisors (1).

163940269 is an equidigital number, since it uses as much as digits as its factorization.

163940269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 163940269 is about 12803.9161587383. The cubic root of 163940269 is about 547.3039062003.

The spelling of 163940269 in words is "one hundred sixty-three million, nine hundred forty thousand, two hundred sixty-nine".