163693213 has 2 divisors, whose sum is σ = 163693214. Its totient is φ = 163693212.

The previous prime is 163693207. The next prime is 163693249. The reversal of 163693213 is 312396361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140825689 + 22867524 = 11867^2 + 4782^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163693213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163693253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81846606 + 81846607.

It is an arithmetic number, because the mean of its divisors is an integer number (81846607).

Almost surely, 2^163693213 is an apocalyptic number.

It is an amenable number.

163693213 is a deficient number, since it is larger than the sum of its proper divisors (1).

163693213 is an equidigital number, since it uses as much as digits as its factorization.

163693213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 34.

The square root of 163693213 is about 12794.2648479700. The cubic root of 163693213 is about 547.0288411946.

It can be divided in two parts, 1636 and 93213, that added together give a palindrome (94849).

The spelling of 163693213 in words is "one hundred sixty-three million, six hundred ninety-three thousand, two hundred thirteen".