726405541 has 2 divisors, whose sum is σ = 726405542. Its totient is φ = 726405540.

The previous prime is 726405509. The next prime is 726405551. The reversal of 726405541 is 145504627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 726302500 + 103041 = 26950^2 + 321^2 .

It is a cyclic number.

It is not a de Polignac number, because 726405541 - 2⁵ = 726405509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 726405497 and 726405506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726405551) 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, 363202770 + 363202771.

It is an arithmetic number, because the mean of its divisors is an integer number (363202771).

Almost surely, 2^726405541 is an apocalyptic number.

It is an amenable number.

726405541 is a deficient number, since it is larger than the sum of its proper divisors (1).

726405541 is an equidigital number, since it uses as much as digits as its factorization.

726405541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 726405541 is about 26951.9116390656. The cubic root of 726405541 is about 898.9310522916.

The spelling of 726405541 in words is "seven hundred twenty-six million, four hundred five thousand, five hundred forty-one".