726381401 has 2 divisors, whose sum is σ = 726381402. Its totient is φ = 726381400.

The previous prime is 726381361. The next prime is 726381427. The reversal of 726381401 is 104183627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603193600 + 123187801 = 24560^2 + 11099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726381401 is a prime.

It is not a weakly prime, because it can be changed into another prime (726381451) 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, 363190700 + 363190701.

It is an arithmetic number, because the mean of its divisors is an integer number (363190701).

Almost surely, 2^726381401 is an apocalyptic number.

It is an amenable number.

726381401 is a deficient number, since it is larger than the sum of its proper divisors (1).

726381401 is an equidigital number, since it uses as much as digits as its factorization.

726381401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 726381401 is about 26951.4638006918. The cubic root of 726381401 is about 898.9210943848.

The spelling of 726381401 in words is "seven hundred twenty-six million, three hundred eighty-one thousand, four hundred one".