163400634 has 24 divisors (see below), whose sum is σ = 374860980. Its totient is φ = 51262848.

The previous prime is 163400609. The next prime is 163400669. The reversal of 163400634 is 436004361.

It can be written as a sum of positive squares in 2 ways, for example, as 126495009 + 36905625 = 11247^2 + 6075^2 .

It is a junction number, because it is equal to n+sod(n) for n = 163400598 and 163400607.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 266689 + ... + 267300.

Almost surely, 2^163400634 is an apocalyptic number.

163400634 is an abundant number, since it is smaller than the sum of its proper divisors (211460346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163400634 is a wasteful number, since it uses less digits than its factorization.

163400634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534014 (or 534011 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 163400634 is about 12782.8257439425. The cubic root of 163400634 is about 546.7027340041.

Adding to 163400634 its reverse (436004361), we get a palindrome (599404995).

The spelling of 163400634 in words is "one hundred sixty-three million, four hundred thousand, six hundred thirty-four".