163861369 has 8 divisors (see below), whose sum is σ = 188745728. Its totient is φ = 139345920.

The previous prime is 163861363. The next prime is 163861391. The reversal of 163861369 is 963168361.

163861369 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 163861369 - 2⁵ = 163861337 is a prime.

It is a super-2 number, since 2×163861369² = 53701096501108322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163861363) 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, 91272 + ... + 93049.

It is an arithmetic number, because the mean of its divisors is an integer number (23593216).

Almost surely, 2^163861369 is an apocalyptic number.

It is an amenable number.

163861369 is a deficient number, since it is larger than the sum of its proper divisors (24884359).

163861369 is a wasteful number, since it uses less digits than its factorization.

163861369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184455.

The product of its digits is 139968, while the sum is 43.

The square root of 163861369 is about 12800.8346993468. The cubic root of 163861369 is about 547.2160912748.

The spelling of 163861369 in words is "one hundred sixty-three million, eight hundred sixty-one thousand, three hundred sixty-nine".