163604434 has 12 divisors (see below), whose sum is σ = 285473214. Its totient is φ = 70116144.

The previous prime is 163604411. The next prime is 163604437. The reversal of 163604434 is 434406361.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 83448225 + 80156209 = 9135^2 + 8953^2 .

It is a junction number, because it is equal to n+sod(n) for n = 163604396 and 163604405.

It is not an unprimeable number, because it can be changed into a prime (163604437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 834619 + ... + 834814.

Almost surely, 2^163604434 is an apocalyptic number.

163604434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

163604434 is a deficient number, since it is larger than the sum of its proper divisors (121868780).

163604434 is a wasteful number, since it uses less digits than its factorization.

163604434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669449 (or 1669442 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 163604434 is about 12790.7948932035. The cubic root of 163604434 is about 546.9299296292.

The spelling of 163604434 in words is "one hundred sixty-three million, six hundred four thousand, four hundred thirty-four".