163803813 has 8 divisors (see below), whose sum is σ = 223484448. Its totient is φ = 106662864.

The previous prime is 163803791. The next prime is 163803817. The reversal of 163803813 is 318308361.

It is a happy number.

163803813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163803813 - 2⁵ = 163803781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163803817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634770 + ... + 635027.

It is an arithmetic number, because the mean of its divisors is an integer number (27935556).

Almost surely, 2^163803813 is an apocalyptic number.

It is an amenable number.

163803813 is a deficient number, since it is larger than the sum of its proper divisors (59680635).

163803813 is a wasteful number, since it uses less digits than its factorization.

163803813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269843.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 163803813 is about 12798.5863672517. The cubic root of 163803813 is about 547.1520142283.

The spelling of 163803813 in words is "one hundred sixty-three million, eight hundred three thousand, eight hundred thirteen".