163344393 has 6 divisors (see below), whose sum is σ = 235941914. Its totient is φ = 108896256.

The previous prime is 163344361. The next prime is 163344403. The reversal of 163344393 is 393443361.

It can be written as a sum of positive squares in only one way, i.e., 130028409 + 33315984 = 11403^2 + 5772^2 .

It is not a de Polignac number, because 163344393 - 2⁵ = 163344361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163344343) 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, 9074680 + ... + 9074697.

Almost surely, 2^163344393 is an apocalyptic number.

It is an amenable number.

163344393 is a deficient number, since it is larger than the sum of its proper divisors (72597521).

163344393 is a wasteful number, since it uses less digits than its factorization.

163344393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18149383 (or 18149380 counting only the distinct ones).

The product of its digits is 69984, while the sum is 36.

The square root of 163344393 is about 12780.6256889090. The cubic root of 163344393 is about 546.6400034504.

The spelling of 163344393 in words is "one hundred sixty-three million, three hundred forty-four thousand, three hundred ninety-three".