163800811 has 4 divisors (see below), whose sum is σ = 163975824. Its totient is φ = 163625800.

The previous prime is 163800809. The next prime is 163800817. The reversal of 163800811 is 118008361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118008361 = 409 ⋅288529.

It is a cyclic number.

It is not a de Polignac number, because 163800811 - 2¹ = 163800809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163800811.

It is not an unprimeable number, because it can be changed into a prime (163800817) 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, 86095 + ... + 87976.

It is an arithmetic number, because the mean of its divisors is an integer number (40993956).

Almost surely, 2^163800811 is an apocalyptic number.

163800811 is a deficient number, since it is larger than the sum of its proper divisors (175013).

163800811 is an equidigital number, since it uses as much as digits as its factorization.

163800811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175012.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 163800811 is about 12798.4690881371. The cubic root of 163800811 is about 547.1486716924.

The spelling of 163800811 in words is "one hundred sixty-three million, eight hundred thousand, eight hundred eleven".