960687521 has 4 divisors (see below), whose sum is σ = 963966612. Its totient is φ = 957408432.

The previous prime is 960687517. The next prime is 960687547. The reversal of 960687521 is 125786069.

960687521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125786069 = 131 ⋅960199.

It can be written as a sum of positive squares in 2 ways, for example, as 926593600 + 34093921 = 30440^2 + 5839^2 .

It is a cyclic number.

It is not a de Polignac number, because 960687521 - 2² = 960687517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (960687571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1639106 + ... + 1639691.

It is an arithmetic number, because the mean of its divisors is an integer number (240991653).

Almost surely, 2^960687521 is an apocalyptic number.

It is an amenable number.

960687521 is a deficient number, since it is larger than the sum of its proper divisors (3279091).

960687521 is a wasteful number, since it uses less digits than its factorization.

960687521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279090.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 960687521 is about 30994.9596063618. The cubic root of 960687521 is about 986.7202697296.

The spelling of 960687521 in words is "nine hundred sixty million, six hundred eighty-seven thousand, five hundred twenty-one".