9709934521 has 15 divisors (see below), whose sum is σ = 11333218533. Its totient is φ = 8318662380.

The previous prime is 9709934501. The next prime is 9709934537. The reversal of 9709934521 is 1254399079.

The square root of 9709934521 is 98539.

It is a perfect power (a square), and thus also a powerful number.

9709934521 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9709934521 - 2³³ = 1119999929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (9709934501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4827406 + ... + 4829416.

Almost surely, 2^9709934521 is an apocalyptic number.

9709934521 is the 98539-th square number.

9709934521 is the 49270-th centered octagonal number.

It is an amenable number.

9709934521 is a deficient number, since it is larger than the sum of its proper divisors (1623284012).

9709934521 is an frugal number, since it uses more digits than its factorization.

9709934521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 49.

The cubic root of 9709934521 is about 2133.3990649967.

Multiplying 9709934521 by its sum of digits (49), we get a square (475786791529 = 689773²).

9709934521 divided by its sum of digits (49) gives a square (198161929 = 14077²).

The spelling of 9709934521 in words is "nine billion, seven hundred nine million, nine hundred thirty-four thousand, five hundred twenty-one".