722688513 has 16 divisors (see below), whose sum is σ = 1021648320. Its totient is φ = 452837376.

The previous prime is 722688511. The next prime is 722688521. The reversal of 722688513 is 315886227.

It is not a de Polignac number, because 722688513 - 2¹ = 722688511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (722688511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30006 + ... + 48432.

It is an arithmetic number, because the mean of its divisors is an integer number (63853020).

Almost surely, 2^722688513 is an apocalyptic number.

It is an amenable number.

722688513 is a deficient number, since it is larger than the sum of its proper divisors (298959807).

722688513 is a wasteful number, since it uses less digits than its factorization.

722688513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19216.

The product of its digits is 161280, while the sum is 42.

The square root of 722688513 is about 26882.8665324217. The cubic root of 722688513 is about 897.3951483514.

The spelling of 722688513 in words is "seven hundred twenty-two million, six hundred eighty-eight thousand, five hundred thirteen".