720099 has 24 divisors (see below), whose sum is σ = 1123200. Its totient is φ = 443520.

The previous prime is 720091. The next prime is 720101. The reversal of 720099 is 990027.

It is not a de Polignac number, because 720099 - 2³ = 720091 is a prime.

720099 is a modest number, since divided by 99 gives 72 as remainder.

It is not an unprimeable number, because it can be changed into a prime (720091) 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 23 ways as a sum of consecutive naturals, for example, 8047 + ... + 8135.

It is an arithmetic number, because the mean of its divisors is an integer number (46800).

2⁷²⁰⁰⁹⁹ is an apocalyptic number.

720099 is a deficient number, since it is larger than the sum of its proper divisors (403101).

720099 is a wasteful number, since it uses less digits than its factorization.

720099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 720099 is about 848.5864717281. The cubic root of 720099 is about 89.6322026972.

The spelling of 720099 in words is "seven hundred twenty thousand, ninety-nine".