726749 has 4 divisors (see below), whose sum is σ = 737664. Its totient is φ = 715836.

The previous prime is 726707. The next prime is 726751. The reversal of 726749 is 947627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5357 + ... + 5490.

It is an arithmetic number, because the mean of its divisors is an integer number (184416).

2⁷²⁶⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

726749 is a deficient number, since it is larger than the sum of its proper divisors (10915).

726749 is a wasteful number, since it uses less digits than its factorization.

726749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10914.

The product of its digits is 21168, while the sum is 35.

The square root of 726749 is about 852.4957477900. The cubic root of 726749 is about 89.9072707467.

The spelling of 726749 in words is "seven hundred twenty-six thousand, seven hundred forty-nine".