720623999 has 8 divisors (see below), whose sum is σ = 763253280. Its totient is φ = 678021376.

The previous prime is 720623993. The next prime is 720624007. The reversal of 720623999 is 999326027.

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 720623999 - 2⁴ = 720623983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720623993) 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, 85622 + ... + 93660.

It is an arithmetic number, because the mean of its divisors is an integer number (95406660).

Almost surely, 2^720623999 is an apocalyptic number.

720623999 is a deficient number, since it is larger than the sum of its proper divisors (42629281).

720623999 is a wasteful number, since it uses less digits than its factorization.

720623999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13329.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 720623999 is about 26844.4407466425. The cubic root of 720623999 is about 896.5397997396.

The spelling of 720623999 in words is "seven hundred twenty million, six hundred twenty-three thousand, nine hundred ninety-nine".