163875993 has 4 divisors (see below), whose sum is σ = 218501328. Its totient is φ = 109250660.

The previous prime is 163875991. The next prime is 163876001. The reversal of 163875993 is 399578361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163875993 - 2¹ = 163875991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163875991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27312663 + ... + 27312668.

It is an arithmetic number, because the mean of its divisors is an integer number (54625332).

Almost surely, 2^163875993 is an apocalyptic number.

It is an amenable number.

163875993 is a deficient number, since it is larger than the sum of its proper divisors (54625335).

163875993 is an equidigital number, since it uses as much as digits as its factorization.

163875993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54625334.

The product of its digits is 1224720, while the sum is 51.

The square root of 163875993 is about 12801.4058993534. The cubic root of 163875993 is about 547.2323697711.

The spelling of 163875993 in words is "one hundred sixty-three million, eight hundred seventy-five thousand, nine hundred ninety-three".