720757213 has 16 divisors (see below), whose sum is σ = 814665600. Its totient is φ = 631650880.

The previous prime is 720757201. The next prime is 720757231. The reversal of 720757213 is 312757027.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720757213 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 (720754213) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 266295 + ... + 268987.

It is an arithmetic number, because the mean of its divisors is an integer number (50916600).

Almost surely, 2^720757213 is an apocalyptic number.

It is an amenable number.

720757213 is a deficient number, since it is larger than the sum of its proper divisors (93908387).

720757213 is a wasteful number, since it uses less digits than its factorization.

720757213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 720757213 is about 26846.9218533522. The cubic root of 720757213 is about 896.5950408891.

The spelling of 720757213 in words is "seven hundred twenty million, seven hundred fifty-seven thousand, two hundred thirteen".