163805953 has 8 divisors (see below), whose sum is σ = 169262336. Its totient is φ = 158360400.

The previous prime is 163805933. The next prime is 163805959. The reversal of 163805953 is 359508361.

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

It is not a de Polignac number, because 163805953 - 2⁵ = 163805921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163805959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37975 + ... + 42067.

It is an arithmetic number, because the mean of its divisors is an integer number (21157792).

Almost surely, 2^163805953 is an apocalyptic number.

It is an amenable number.

163805953 is a deficient number, since it is larger than the sum of its proper divisors (5456383).

163805953 is a wasteful number, since it uses less digits than its factorization.

163805953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5415.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 163805953 is about 12798.6699699617. The cubic root of 163805953 is about 547.1543969572.

The spelling of 163805953 in words is "one hundred sixty-three million, eight hundred five thousand, nine hundred fifty-three".