720535513 has 8 divisors (see below), whose sum is σ = 753571008. Its totient is φ = 687642384.

The previous prime is 720535507. The next prime is 720535549. The reversal of 720535513 is 315535027.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720535513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720535913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25170 + ... + 45547.

It is an arithmetic number, because the mean of its divisors is an integer number (94196376).

Almost surely, 2^720535513 is an apocalyptic number.

It is an amenable number.

720535513 is a deficient number, since it is larger than the sum of its proper divisors (33035495).

720535513 is a wasteful number, since it uses less digits than its factorization.

720535513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71183.

The product of its (nonzero) digits is 15750, while the sum is 31.

The square root of 720535513 is about 26842.7925708187. The cubic root of 720535513 is about 896.5031026233.

It can be divided in two parts, 720535 and 513, that multiplied together give a triangular number (369634455 = T₂₇₁₈₉).

The spelling of 720535513 in words is "seven hundred twenty million, five hundred thirty-five thousand, five hundred thirteen".