726561373 has 2 divisors, whose sum is σ = 726561374. Its totient is φ = 726561372.

The previous prime is 726561347. The next prime is 726561403. The reversal of 726561373 is 373165627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 464704249 + 261857124 = 21557^2 + 16182^2 .

It is an emirp because it is prime and its reverse (373165627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 726561373 - 2¹³ = 726553181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726561313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363280686 + 363280687.

It is an arithmetic number, because the mean of its divisors is an integer number (363280687).

Almost surely, 2^726561373 is an apocalyptic number.

It is an amenable number.

726561373 is a deficient number, since it is larger than the sum of its proper divisors (1).

726561373 is an equidigital number, since it uses as much as digits as its factorization.

726561373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 40.

The square root of 726561373 is about 26954.8024107023. The cubic root of 726561373 is about 898.9953286955.

The spelling of 726561373 in words is "seven hundred twenty-six million, five hundred sixty-one thousand, three hundred seventy-three".