163535913 has 6 divisors (see below), whose sum is σ = 236218554. Its totient is φ = 109023936.

The previous prime is 163535909. The next prime is 163535917. The reversal of 163535913 is 319535361.

163535913 is a `hidden beast` number, since 1 + 63 + 5 + 3 + 591 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (163535909) and next prime (163535917).

It can be written as a sum of positive squares in only one way, i.e., 163021824 + 514089 = 12768^2 + 717^2 .

It is not a de Polignac number, because 163535913 - 2² = 163535909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163535917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9085320 + ... + 9085337.

It is an arithmetic number, because the mean of its divisors is an integer number (39369759).

Almost surely, 2^163535913 is an apocalyptic number.

It is an amenable number.

163535913 is a deficient number, since it is larger than the sum of its proper divisors (72682641).

163535913 is a wasteful number, since it uses less digits than its factorization.

163535913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18170663 (or 18170660 counting only the distinct ones).

The product of its digits is 36450, while the sum is 36.

The square root of 163535913 is about 12788.1160848657. The cubic root of 163535913 is about 546.8535636898.

The spelling of 163535913 in words is "one hundred sixty-three million, five hundred thirty-five thousand, nine hundred thirteen".