720337 has 4 divisors (see below), whose sum is σ = 751680. Its totient is φ = 688996.

The previous prime is 720319. The next prime is 720359. The reversal of 720337 is 733027.

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, and also an emirpimes, since its reverse is a distinct semiprime: 733027 = 311 ⋅2357.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720337 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720367) 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, 15637 + ... + 15682.

It is an arithmetic number, because the mean of its divisors is an integer number (187920).

2⁷²⁰³³⁷ is an apocalyptic number.

It is an amenable number.

720337 is a deficient number, since it is larger than the sum of its proper divisors (31343).

720337 is a wasteful number, since it uses less digits than its factorization.

720337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31342.

The product of its (nonzero) digits is 882, while the sum is 22.

The square root of 720337 is about 848.7266933472. The cubic root of 720337 is about 89.6420763926.

The spelling of 720337 in words is "seven hundred twenty thousand, three hundred thirty-seven".