726939841 has 2 divisors, whose sum is σ = 726939842. Its totient is φ = 726939840.

The previous prime is 726939809. The next prime is 726939847. The reversal of 726939841 is 148939627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 533841025 + 193098816 = 23105^2 + 13896^2 .

It is an emirp because it is prime and its reverse (148939627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 726939841 - 2⁵ = 726939809 is a prime.

It is not a weakly prime, because it can be changed into another prime (726939847) 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, 363469920 + 363469921.

It is an arithmetic number, because the mean of its divisors is an integer number (363469921).

Almost surely, 2^726939841 is an apocalyptic number.

It is an amenable number.

726939841 is a deficient number, since it is larger than the sum of its proper divisors (1).

726939841 is an equidigital number, since it uses as much as digits as its factorization.

726939841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 726939841 is about 26961.8219154418. The cubic root of 726939841 is about 899.1513980547.

The spelling of 726939841 in words is "seven hundred twenty-six million, nine hundred thirty-nine thousand, eight hundred forty-one".