163664353 has 4 divisors (see below), whose sum is σ = 164015280. Its totient is φ = 163313428.

The previous prime is 163664329. The next prime is 163664377. The reversal of 163664353 is 353466361.

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, and also an emirpimes, since its reverse is a distinct semiprime: 353466361 = 2689 ⋅131449.

It is an interprime number because it is at equal distance from previous prime (163664329) and next prime (163664377).

It is a cyclic number.

It is not a de Polignac number, because 163664353 - 2¹⁷ = 163533281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163664323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174763 + ... + 175696.

It is an arithmetic number, because the mean of its divisors is an integer number (41003820).

Almost surely, 2^163664353 is an apocalyptic number.

It is an amenable number.

163664353 is a deficient number, since it is larger than the sum of its proper divisors (350927).

163664353 is an equidigital number, since it uses as much as digits as its factorization.

163664353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350926.

The product of its digits is 116640, while the sum is 37.

The square root of 163664353 is about 12793.1369491615. The cubic root of 163664353 is about 546.9966912560.

The spelling of 163664353 in words is "one hundred sixty-three million, six hundred sixty-four thousand, three hundred fifty-three".