720477617 has 8 divisors (see below), whose sum is σ = 736926336. Its totient is φ = 704075632.

The previous prime is 720477557. The next prime is 720477643. The reversal of 720477617 is 716774027.

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 720477617 - 2⁸ = 720477361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720477647) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20498 + ... + 43140.

It is an arithmetic number, because the mean of its divisors is an integer number (92115792).

Almost surely, 2^720477617 is an apocalyptic number.

It is an amenable number.

720477617 is a deficient number, since it is larger than the sum of its proper divisors (16448719).

720477617 is a wasteful number, since it uses less digits than its factorization.

720477617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23367.

The product of its (nonzero) digits is 115248, while the sum is 41.

The square root of 720477617 is about 26841.7141218664. The cubic root of 720477617 is about 896.4790902358.

The spelling of 720477617 in words is "seven hundred twenty million, four hundred seventy-seven thousand, six hundred seventeen".