163907964 has 72 divisors (see below), whose sum is σ = 453398400. Its totient is φ = 49514400.

The previous prime is 163907963. The next prime is 163907993. The reversal of 163907964 is 469709361.

163907964 is a `hidden beast` number, since 1 + 639 + 0 + 7 + 9 + 6 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163907963) 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 23 ways as a sum of consecutive naturals, for example, 236859 + ... + 237549.

It is an arithmetic number, because the mean of its divisors is an integer number (6297200).

Almost surely, 2^163907964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163907964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226699200).

163907964 is an abundant number, since it is smaller than the sum of its proper divisors (289490436).

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

163907964 is a wasteful number, since it uses less digits than its factorization.

163907964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 163907964 is about 12802.6545684870. The cubic root of 163907964 is about 547.2679544595.

The spelling of 163907964 in words is "one hundred sixty-three million, nine hundred seven thousand, nine hundred sixty-four".