163541603 has 2 divisors, whose sum is σ = 163541604. Its totient is φ = 163541602.

The previous prime is 163541593. The next prime is 163541611. The reversal of 163541603 is 306145361.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163541603 - 2⁸ = 163541347 is a prime.

It is not a weakly prime, because it can be changed into another prime (163541633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81770801 + 81770802.

It is an arithmetic number, because the mean of its divisors is an integer number (81770802).

Almost surely, 2^163541603 is an apocalyptic number.

163541603 is a deficient number, since it is larger than the sum of its proper divisors (1).

163541603 is an equidigital number, since it uses as much as digits as its factorization.

163541603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 163541603 is about 12788.3385551056. The cubic root of 163541603 is about 546.8599059475.

Adding to 163541603 its reverse (306145361), we get a palindrome (469686964).

The spelling of 163541603 in words is "one hundred sixty-three million, five hundred forty-one thousand, six hundred three".