163893793 has 4 divisors (see below), whose sum is σ = 187307200. Its totient is φ = 140480388.

The previous prime is 163893749. The next prime is 163893803. The reversal of 163893793 is 397398361.

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, and also an emirpimes, since its reverse is a distinct semiprime: 397398361 = 79 ⋅5030359.

It is a cyclic number.

It is not a de Polignac number, because 163893793 - 2²⁵ = 130339361 is a prime.

It is a super-2 number, since 2×163893793² = 53722350767853698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163893733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11706693 + ... + 11706706.

It is an arithmetic number, because the mean of its divisors is an integer number (46826800).

Almost surely, 2^163893793 is an apocalyptic number.

It is an amenable number.

163893793 is a deficient number, since it is larger than the sum of its proper divisors (23413407).

163893793 is an equidigital number, since it uses as much as digits as its factorization.

163893793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23413406.

The product of its digits is 734832, while the sum is 49.

The square root of 163893793 is about 12802.1011166136. The cubic root of 163893793 is about 547.2521822796.

The spelling of 163893793 in words is "one hundred sixty-three million, eight hundred ninety-three thousand, seven hundred ninety-three".