726407149 has 4 divisors (see below), whose sum is σ = 782284636. Its totient is φ = 670529664.

The previous prime is 726407147. The next prime is 726407153. The reversal of 726407149 is 941704627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45562500 + 680844649 = 6750^2 + 26093^2 .

It is a cyclic number.

It is not a de Polignac number, because 726407149 - 2¹ = 726407147 is a prime.

It is a super-2 number, since 2×726407149² = 1055334692236616402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726407141) 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 in 3 ways as a sum of consecutive naturals, for example, 27938724 + ... + 27938749.

It is an arithmetic number, because the mean of its divisors is an integer number (195571159).

Almost surely, 2^726407149 is an apocalyptic number.

It is an amenable number.

726407149 is a deficient number, since it is larger than the sum of its proper divisors (55877487).

726407149 is a wasteful number, since it uses less digits than its factorization.

726407149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55877486.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 726407149 is about 26951.9414699572. The cubic root of 726407149 is about 898.9317155942.

The spelling of 726407149 in words is "seven hundred twenty-six million, four hundred seven thousand, one hundred forty-nine".