720699 has 8 divisors (see below), whose sum is σ = 1098240. Its totient is φ = 411816.

The previous prime is 720697. The next prime is 720703. The reversal of 720699 is 996027.

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

It is not a de Polignac number, because 720699 - 2¹ = 720697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720697) 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, 17139 + ... + 17180.

It is an arithmetic number, because the mean of its divisors is an integer number (137280).

2⁷²⁰⁶⁹⁹ is an apocalyptic number.

720699 is a deficient number, since it is larger than the sum of its proper divisors (377541).

720699 is a wasteful number, since it uses less digits than its factorization.

720699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34329.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 720699 is about 848.9399272033. The cubic root of 720699 is about 89.6570901974.

It can be divided in two parts, 7 and 20699, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 720699 in words is "seven hundred twenty thousand, six hundred ninety-nine".