726380647 has 2 divisors, whose sum is σ = 726380648. Its totient is φ = 726380646.

The previous prime is 726380609. The next prime is 726380651. The reversal of 726380647 is 746083627.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 726380647 - 2⁷ = 726380519 is a prime.

It is a super-2 number, since 2×726380647² = 1055257688672277218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726380657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363190323 + 363190324.

It is an arithmetic number, because the mean of its divisors is an integer number (363190324).

Almost surely, 2^726380647 is an apocalyptic number.

726380647 is a deficient number, since it is larger than the sum of its proper divisors (1).

726380647 is an equidigital number, since it uses as much as digits as its factorization.

726380647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 726380647 is about 26951.4498125797. The cubic root of 726380647 is about 898.9207833514.

The spelling of 726380647 in words is "seven hundred twenty-six million, three hundred eighty thousand, six hundred forty-seven".