720624985 has 8 divisors (see below), whose sum is σ = 915617736. Its totient is φ = 542588160.

The previous prime is 720624967. The next prime is 720625021. The reversal of 720624985 is 589426027.

It can be written as a sum of positive squares in 4 ways, for example, as 263477824 + 457147161 = 16232^2 + 21381^2 .

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

It is not a de Polignac number, because 720624985 - 2⁵ = 720624953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4238886 + ... + 4239055.

It is an arithmetic number, because the mean of its divisors is an integer number (114452217).

Almost surely, 2^720624985 is an apocalyptic number.

It is an amenable number.

720624985 is a deficient number, since it is larger than the sum of its proper divisors (194992751).

720624985 is a wasteful number, since it uses less digits than its factorization.

720624985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8477963.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 720624985 is about 26844.4591117050. The cubic root of 720624985 is about 896.5402086388.

The spelling of 720624985 in words is "seven hundred twenty million, six hundred twenty-four thousand, nine hundred eighty-five".