163873765 has 16 divisors (see below), whose sum is σ = 225817920. Its totient is φ = 112907520.

The previous prime is 163873763. The next prime is 163873847. The reversal of 163873765 is 567378361.

It is not a de Polignac number, because 163873765 - 2¹ = 163873763 is a prime.

It is a super-2 number, since 2×163873765² = 53709221710550450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163873763) 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 15 ways as a sum of consecutive naturals, for example, 77364 + ... + 79453.

It is an arithmetic number, because the mean of its divisors is an integer number (14113620).

Almost surely, 2^163873765 is an apocalyptic number.

It is an amenable number.

163873765 is a deficient number, since it is larger than the sum of its proper divisors (61944155).

163873765 is a wasteful number, since it uses less digits than its factorization.

163873765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156852.

The product of its digits is 635040, while the sum is 46.

The square root of 163873765 is about 12801.3188773657. The cubic root of 163873765 is about 547.2298897673.

The spelling of 163873765 in words is "one hundred sixty-three million, eight hundred seventy-three thousand, seven hundred sixty-five".