168993343357 has 2 divisors, whose sum is σ = 168993343358. Its totient is φ = 168993343356.

The previous prime is 168993343339. The next prime is 168993343361. The reversal of 168993343357 is 753343399861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154408916601 + 14584426756 = 392949^2 + 120766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168993343357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168993343295 and 168993343304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168993341357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84496671678 + 84496671679.

It is an arithmetic number, because the mean of its divisors is an integer number (84496671679).

Almost surely, 2^168993343357 is an apocalyptic number.

It is an amenable number.

168993343357 is a deficient number, since it is larger than the sum of its proper divisors (1).

168993343357 is an equidigital number, since it uses as much as digits as its factorization.

168993343357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44089920, while the sum is 61.

The spelling of 168993343357 in words is "one hundred sixty-eight billion, nine hundred ninety-three million, three hundred forty-three thousand, three hundred fifty-seven".