168613493 has 2 divisors, whose sum is σ = 168613494. Its totient is φ = 168613492.

The previous prime is 168613441. The next prime is 168613499. The reversal of 168613493 is 394316861.

168613493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157577809 + 11035684 = 12553^2 + 3322^2 .

It is a cyclic number.

It is not a de Polignac number, because 168613493 - 2¹⁰ = 168612469 is a prime.

It is a super-2 number, since 2×168613493² = 56861020043322098, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 168613493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168613499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84306746 + 84306747.

It is an arithmetic number, because the mean of its divisors is an integer number (84306747).

Almost surely, 2^168613493 is an apocalyptic number.

It is an amenable number.

168613493 is a deficient number, since it is larger than the sum of its proper divisors (1).

168613493 is an equidigital number, since it uses as much as digits as its factorization.

168613493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 168613493 is about 12985.1258368951. The cubic root of 168613493 is about 552.4556783512.

The spelling of 168613493 in words is "one hundred sixty-eight million, six hundred thirteen thousand, four hundred ninety-three".