9750840521 has 4 divisors (see below), whose sum is σ = 9755592132. Its totient is φ = 9746088912.

The previous prime is 9750840487. The next prime is 9750840523. The reversal of 9750840521 is 1250480579.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1250480579 = 8563 ⋅146033.

It can be written as a sum of positive squares in 2 ways, for example, as 5911303225 + 3839537296 = 76885^2 + 61964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9750840521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9750840523) 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, 2372726 + ... + 2376831.

It is an arithmetic number, because the mean of its divisors is an integer number (2438898033).

Almost surely, 2^9750840521 is an apocalyptic number.

It is an amenable number.

9750840521 is a deficient number, since it is larger than the sum of its proper divisors (4751611).

9750840521 is a wasteful number, since it uses less digits than its factorization.

9750840521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751610.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 9750840521 is about 98746.3443424616. The cubic root of 9750840521 is about 2136.3907281337.

The spelling of 9750840521 in words is "nine billion, seven hundred fifty million, eight hundred forty thousand, five hundred twenty-one".