163864613 has 12 divisors (see below), whose sum is σ = 180802860. Its totient is φ = 148399680.

The previous prime is 163864609. The next prime is 163864619. The reversal of 163864613 is 316468361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 69522244 + 94342369 = 8338^2 + 9713^2 .

It is not a de Polignac number, because 163864613 - 2² = 163864609 is a prime.

It is a super-2 number, since 2×163864613² = 53703222787279538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163864619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31073 + ... + 35961.

It is an arithmetic number, because the mean of its divisors is an integer number (15066905).

Almost surely, 2^163864613 is an apocalyptic number.

It is an amenable number.

163864613 is a deficient number, since it is larger than the sum of its proper divisors (16938247).

163864613 is a wasteful number, since it uses less digits than its factorization.

163864613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188 (or 5177 counting only the distinct ones).

The product of its digits is 62208, while the sum is 38.

The square root of 163864613 is about 12800.9614092067. The cubic root of 163864613 is about 547.2197023705.

The spelling of 163864613 in words is "one hundred sixty-three million, eight hundred sixty-four thousand, six hundred thirteen".