723912197 has 2 divisors, whose sum is σ = 723912198. Its totient is φ = 723912196.

The previous prime is 723912191. The next prime is 723912199. The reversal of 723912197 is 791219327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388326436 + 335585761 = 19706^2 + 18319^2 .

It is an emirp because it is prime and its reverse (791219327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 723912197 - 2⁸ = 723911941 is a prime.

Together with 723912199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723912191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361956098 + 361956099.

It is an arithmetic number, because the mean of its divisors is an integer number (361956099).

Almost surely, 2^723912197 is an apocalyptic number.

It is an amenable number.

723912197 is a deficient number, since it is larger than the sum of its proper divisors (1).

723912197 is an equidigital number, since it uses as much as digits as its factorization.

723912197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 41.

The square root of 723912197 is about 26905.6164582787. The cubic root of 723912197 is about 897.9013640768.

The spelling of 723912197 in words is "seven hundred twenty-three million, nine hundred twelve thousand, one hundred ninety-seven".