163405925 has 12 divisors (see below), whose sum is σ = 202995936. Its totient is φ = 130484400.

The previous prime is 163405903. The next prime is 163405999. The reversal of 163405925 is 529504361.

163405925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163405925 - 2¹⁶ = 163340389 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8552 + ... + 19998.

It is an arithmetic number, because the mean of its divisors is an integer number (16916328).

Almost surely, 2^163405925 is an apocalyptic number.

It is an amenable number.

163405925 is a deficient number, since it is larger than the sum of its proper divisors (39590011).

163405925 is a wasteful number, since it uses less digits than its factorization.

163405925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12028 (or 12023 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 163405925 is about 12783.0326996374. The cubic root of 163405925 is about 546.7086347828.

The spelling of 163405925 in words is "one hundred sixty-three million, four hundred five thousand, nine hundred twenty-five".