163681153 has 2 divisors, whose sum is σ = 163681154. Its totient is φ = 163681152.

The previous prime is 163681139. The next prime is 163681157. The reversal of 163681153 is 351186361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90954369 + 72726784 = 9537^2 + 8528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163681153 is a prime.

It is not a weakly prime, because it can be changed into another prime (163681157) 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, 81840576 + 81840577.

It is an arithmetic number, because the mean of its divisors is an integer number (81840577).

Almost surely, 2^163681153 is an apocalyptic number.

It is an amenable number.

163681153 is a deficient number, since it is larger than the sum of its proper divisors (1).

163681153 is an equidigital number, since it uses as much as digits as its factorization.

163681153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 163681153 is about 12793.7935343666. The cubic root of 163681153 is about 547.0154068566.

The spelling of 163681153 in words is "one hundred sixty-three million, six hundred eighty-one thousand, one hundred fifty-three".