163817290973 has 4 divisors (see below), whose sum is σ = 187219761120. Its totient is φ = 140414820828.

The previous prime is 163817290969. The next prime is 163817291039. The reversal of 163817290973 is 379092718361.

163817290973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 163817290973 - 2² = 163817290969 is a prime.

It is a super-2 number, since 2×163817290973² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163817290943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11701235063 + ... + 11701235076.

It is an arithmetic number, because the mean of its divisors is an integer number (46804940280).

Almost surely, 2^163817290973 is an apocalyptic number.

It is an amenable number.

163817290973 is a deficient number, since it is larger than the sum of its proper divisors (23402470147).

163817290973 is an equidigital number, since it uses as much as digits as its factorization.

163817290973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23402470146.

The product of its (nonzero) digits is 3429216, while the sum is 56.

The spelling of 163817290973 in words is "one hundred sixty-three billion, eight hundred seventeen million, two hundred ninety thousand, nine hundred seventy-three".