726027649 has 4 divisors (see below), whose sum is σ = 726101764. Its totient is φ = 725953536.

The previous prime is 726027629. The next prime is 726027661. The reversal of 726027649 is 946720627.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 258084225 + 467943424 = 16065^2 + 21632^2 .

It is a cyclic number.

It is not a de Polignac number, because 726027649 - 2⁷ = 726027521 is a prime.

It is a super-2 number, since 2×726027649² = 1054232294224934402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726027629) 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 in 3 ways as a sum of consecutive naturals, for example, 19632 + ... + 42865.

It is an arithmetic number, because the mean of its divisors is an integer number (181525441).

Almost surely, 2^726027649 is an apocalyptic number.

It is an amenable number.

726027649 is a deficient number, since it is larger than the sum of its proper divisors (74115).

726027649 is a wasteful number, since it uses less digits than its factorization.

726027649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74114.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 726027649 is about 26944.9002410475. The cubic root of 726027649 is about 898.7751440754.

The spelling of 726027649 in words is "seven hundred twenty-six million, twenty-seven thousand, six hundred forty-nine".