720573513 has 12 divisors (see below), whose sum is σ = 1056047664. Its totient is φ = 436711000.

The previous prime is 720573481. The next prime is 720573559. The reversal of 720573513 is 315375027.

It is not a de Polignac number, because 720573513 - 2⁵ = 720573481 is a prime.

It is a super-2 number, since 2×720573513² = 1038452375274322338, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (720573013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 992163 + ... + 992888.

It is an arithmetic number, because the mean of its divisors is an integer number (88003972).

Almost surely, 2^720573513 is an apocalyptic number.

It is an amenable number.

720573513 is a deficient number, since it is larger than the sum of its proper divisors (335474151).

720573513 is a wasteful number, since it uses less digits than its factorization.

720573513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985076 (or 1985065 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 33.

The square root of 720573513 is about 26843.5003864995. The cubic root of 720573513 is about 896.5188624383.

The spelling of 720573513 in words is "seven hundred twenty million, five hundred seventy-three thousand, five hundred thirteen".