720719 has 8 divisors (see below), whose sum is σ = 757248. Its totient is φ = 685080.

The previous prime is 720703. The next prime is 720743. The reversal of 720719 is 917027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720719 - 2⁴ = 720703 is a prime.

It is a super-2 number, since 2×720719² = 1038871753922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720719.

It is not an unprimeable number, because it can be changed into a prime (720779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1904 + ... + 2250.

It is an arithmetic number, because the mean of its divisors is an integer number (94656).

2⁷²⁰⁷¹⁹ is an apocalyptic number.

720719 is a deficient number, since it is larger than the sum of its proper divisors (36529).

720719 is a wasteful number, since it uses less digits than its factorization.

720719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 720719 is about 848.9517065181. The cubic root of 720719 is about 89.6579195428.

The spelling of 720719 in words is "seven hundred twenty thousand, seven hundred nineteen".