163704481 has 2 divisors, whose sum is σ = 163704482. Its totient is φ = 163704480.

The previous prime is 163704479. The next prime is 163704493. The reversal of 163704481 is 184407361.

It is a happy number.

163704481 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., 129960000 + 33744481 = 11400^2 + 5809^2 .

It is a cyclic number.

It is not a de Polignac number, because 163704481 - 2¹ = 163704479 is a prime.

It is a super-2 number, since 2×163704481² = 53598314198958722, which contains 22 as substring.

Together with 163704479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (163704421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81852240 + 81852241.

It is an arithmetic number, because the mean of its divisors is an integer number (81852241).

Almost surely, 2^163704481 is an apocalyptic number.

It is an amenable number.

163704481 is a deficient number, since it is larger than the sum of its proper divisors (1).

163704481 is an equidigital number, since it uses as much as digits as its factorization.

163704481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 163704481 is about 12794.7051939464. The cubic root of 163704481 is about 547.0413926813.

The spelling of 163704481 in words is "one hundred sixty-three million, seven hundred four thousand, four hundred eighty-one".