163313393 has 2 divisors, whose sum is σ = 163313394. Its totient is φ = 163313392.

The previous prime is 163313389. The next prime is 163313429. The reversal of 163313393 is 393313361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144408289 + 18905104 = 12017^2 + 4348^2 .

It is a cyclic number.

It is not a de Polignac number, because 163313393 - 2² = 163313389 is a prime.

It is not a weakly prime, because it can be changed into another prime (163313323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81656696 + 81656697.

It is an arithmetic number, because the mean of its divisors is an integer number (81656697).

Almost surely, 2^163313393 is an apocalyptic number.

It is an amenable number.

163313393 is a deficient number, since it is larger than the sum of its proper divisors (1).

163313393 is an equidigital number, since it uses as much as digits as its factorization.

163313393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 32.

The square root of 163313393 is about 12779.4128581872. The cubic root of 163313393 is about 546.6054202569.

Subtracting from 163313393 its sum of digits (32), we obtain a palindrome (163313361).

The spelling of 163313393 in words is "one hundred sixty-three million, three hundred thirteen thousand, three hundred ninety-three".