163956493 has 2 divisors, whose sum is σ = 163956494. Its totient is φ = 163956492.

The previous prime is 163956487. The next prime is 163956503. The reversal of 163956493 is 394659361.

163956493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162868644 + 1087849 = 12762^2 + 1043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163956493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163956413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81978246 + 81978247.

It is an arithmetic number, because the mean of its divisors is an integer number (81978247).

Almost surely, 2^163956493 is an apocalyptic number.

It is an amenable number.

163956493 is a deficient number, since it is larger than the sum of its proper divisors (1).

163956493 is an equidigital number, since it uses as much as digits as its factorization.

163956493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 46.

The square root of 163956493 is about 12804.5496992280. The cubic root of 163956493 is about 547.3219598604.

The spelling of 163956493 in words is "one hundred sixty-three million, nine hundred fifty-six thousand, four hundred ninety-three".