720316257 has 8 divisors (see below), whose sum is σ = 966173376. Its totient is φ = 477334992.

The previous prime is 720316253. The next prime is 720316273. The reversal of 720316257 is 752613027.

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

It is not a de Polignac number, because 720316257 - 2² = 720316253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720316253) 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, 718378 + ... + 719379.

It is an arithmetic number, because the mean of its divisors is an integer number (120771672).

Almost surely, 2^720316257 is an apocalyptic number.

It is an amenable number.

720316257 is a deficient number, since it is larger than the sum of its proper divisors (245857119).

720316257 is a wasteful number, since it uses less digits than its factorization.

720316257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437927.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 720316257 is about 26838.7081842625. The cubic root of 720316257 is about 896.4121593263.

The spelling of 720316257 in words is "seven hundred twenty million, three hundred sixteen thousand, two hundred fifty-seven".