163752921 has 20 divisors (see below), whose sum is σ = 245872000. Its totient is φ = 108609336.

The previous prime is 163752913. The next prime is 163752923. The reversal of 163752921 is 129257361.

It is not a de Polignac number, because 163752921 - 2³ = 163752913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163752923) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11040 + ... + 21198.

It is an arithmetic number, because the mean of its divisors is an integer number (12293600).

Almost surely, 2^163752921 is an apocalyptic number.

It is an amenable number.

163752921 is a deficient number, since it is larger than the sum of its proper divisors (82119079).

163752921 is a wasteful number, since it uses less digits than its factorization.

163752921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10370 (or 10361 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 163752921 is about 12796.5980244751. The cubic root of 163752921 is about 547.0953437026.

The spelling of 163752921 in words is "one hundred sixty-three million, seven hundred fifty-two thousand, nine hundred twenty-one".