726401651 has 2 divisors, whose sum is σ = 726401652. Its totient is φ = 726401650.

The previous prime is 726401573. The next prime is 726401693. The reversal of 726401651 is 156104627.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726401651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (726401051) 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, 363200825 + 363200826.

It is an arithmetic number, because the mean of its divisors is an integer number (363200826).

Almost surely, 2^726401651 is an apocalyptic number.

726401651 is a deficient number, since it is larger than the sum of its proper divisors (1).

726401651 is an equidigital number, since it uses as much as digits as its factorization.

726401651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 726401651 is about 26951.8394734014. The cubic root of 726401651 is about 898.9294476562.

The spelling of 726401651 in words is "seven hundred twenty-six million, four hundred one thousand, six hundred fifty-one".