726401693 has 2 divisors, whose sum is σ = 726401694. Its totient is φ = 726401692.

The previous prime is 726401651. The next prime is 726401699. The reversal of 726401693 is 396104627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461949049 + 264452644 = 21493^2 + 16262^2 .

It is a cyclic number.

It is not a de Polignac number, because 726401693 - 2¹⁶ = 726336157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726401699) 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, 363200846 + 363200847.

It is an arithmetic number, because the mean of its divisors is an integer number (363200847).

Almost surely, 2^726401693 is an apocalyptic number.

It is an amenable number.

726401693 is a deficient number, since it is larger than the sum of its proper divisors (1).

726401693 is an equidigital number, since it uses as much as digits as its factorization.

726401693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 726401693 is about 26951.8402525690. The cubic root of 726401693 is about 898.9294649814.

The spelling of 726401693 in words is "seven hundred twenty-six million, four hundred one thousand, six hundred ninety-three".