726168197 has 2 divisors, whose sum is σ = 726168198. Its totient is φ = 726168196.

The previous prime is 726168193. The next prime is 726168227. The reversal of 726168197 is 791861627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562353796 + 163814401 = 23714^2 + 12799^2 .

It is a cyclic number.

It is not a de Polignac number, because 726168197 - 2² = 726168193 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726168193) 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, 363084098 + 363084099.

It is an arithmetic number, because the mean of its divisors is an integer number (363084099).

Almost surely, 2^726168197 is an apocalyptic number.

It is an amenable number.

726168197 is a deficient number, since it is larger than the sum of its proper divisors (1).

726168197 is an equidigital number, since it uses as much as digits as its factorization.

726168197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 726168197 is about 26947.5081779373. The cubic root of 726168197 is about 898.8331367697.

The spelling of 726168197 in words is "seven hundred twenty-six million, one hundred sixty-eight thousand, one hundred ninety-seven".