163165603 has 2 divisors, whose sum is σ = 163165604. Its totient is φ = 163165602.

The previous prime is 163165591. The next prime is 163165619. The reversal of 163165603 is 306561361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163165603 - 2¹³ = 163157411 is a prime.

It is not a weakly prime, because it can be changed into another prime (163165003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81582801 + 81582802.

It is an arithmetic number, because the mean of its divisors is an integer number (81582802).

Almost surely, 2^163165603 is an apocalyptic number.

163165603 is a deficient number, since it is larger than the sum of its proper divisors (1).

163165603 is an equidigital number, since it uses as much as digits as its factorization.

163165603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 163165603 is about 12773.6292023841. The cubic root of 163165603 is about 546.4404874777.

The spelling of 163165603 in words is "one hundred sixty-three million, one hundred sixty-five thousand, six hundred three".