163791 has 6 divisors (see below), whose sum is σ = 236600. Its totient is φ = 109188.

The previous prime is 163789. The next prime is 163811. The reversal of 163791 is 197361.

It is not a de Polignac number, because 163791 - 2¹ = 163789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9091 + ... + 9108.

2¹⁶³⁷⁹¹ is an apocalyptic number.

163791 is a deficient number, since it is larger than the sum of its proper divisors (72809).

163791 is a wasteful number, since it uses less digits than its factorization.

163791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18205 (or 18202 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 163791 is about 404.7110080045. The cubic root of 163791 is about 54.7137747484.

It can be divided in two parts, 1637 and 91, that added together give a cube (1728 = 12³).

The spelling of 163791 in words is "one hundred sixty-three thousand, seven hundred ninety-one".