726725749 has 2 divisors, whose sum is σ = 726725750. Its totient is φ = 726725748.

The previous prime is 726725729. The next prime is 726725789. The reversal of 726725749 is 947527627.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434931025 + 291794724 = 20855^2 + 17082^2 .

It is a cyclic number.

It is not a de Polignac number, because 726725749 - 2¹³ = 726717557 is a prime.

It is a super-2 number, since 2×726725749² = 1056260628519222002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726725719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363362874 + 363362875.

It is an arithmetic number, because the mean of its divisors is an integer number (363362875).

Almost surely, 2^726725749 is an apocalyptic number.

It is an amenable number.

726725749 is a deficient number, since it is larger than the sum of its proper divisors (1).

726725749 is an equidigital number, since it uses as much as digits as its factorization.

726725749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1481760, while the sum is 49.

The square root of 726725749 is about 26957.8513424197. The cubic root of 726725749 is about 899.0631193044.

The spelling of 726725749 in words is "seven hundred twenty-six million, seven hundred twenty-five thousand, seven hundred forty-nine".