163944733 has 2 divisors, whose sum is σ = 163944734. Its totient is φ = 163944732.

The previous prime is 163944731. The next prime is 163944761. The reversal of 163944733 is 337449361.

It is a happy number.

163944733 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146821689 + 17123044 = 12117^2 + 4138^2 .

It is a cyclic number.

It is not a de Polignac number, because 163944733 - 2¹ = 163944731 is a prime.

Together with 163944731, 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 (163944731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81972366 + 81972367.

It is an arithmetic number, because the mean of its divisors is an integer number (81972367).

Almost surely, 2^163944733 is an apocalyptic number.

It is an amenable number.

163944733 is a deficient number, since it is larger than the sum of its proper divisors (1).

163944733 is an equidigital number, since it uses as much as digits as its factorization.

163944733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 40.

The square root of 163944733 is about 12804.0904792180. The cubic root of 163944733 is about 547.3088737462.

The spelling of 163944733 in words is "one hundred sixty-three million, nine hundred forty-four thousand, seven hundred thirty-three".