720976985 has 16 divisors (see below), whose sum is σ = 878202000. Its totient is φ = 568144896.

The previous prime is 720976961. The next prime is 720977009. The reversal of 720976985 is 589679027.

It is an interprime number because it is at equal distance from previous prime (720976961) and next prime (720977009).

It can be written as a sum of positive squares in 8 ways, for example, as 164583241 + 556393744 = 12829^2 + 23588^2 .

It is a cyclic number.

It is not a de Polignac number, because 720976985 - 2²⁶ = 653868121 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120341 + ... + 126189.

It is an arithmetic number, because the mean of its divisors is an integer number (54887625).

Almost surely, 2^720976985 is an apocalyptic number.

It is an amenable number.

720976985 is a deficient number, since it is larger than the sum of its proper divisors (157225015).

720976985 is a wasteful number, since it uses less digits than its factorization.

720976985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6220.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 720976985 is about 26851.0145990799. The cubic root of 720976985 is about 896.6861610137.

The spelling of 720976985 in words is "seven hundred twenty million, nine hundred seventy-six thousand, nine hundred eighty-five".