6983549521 has 12 divisors (see below), whose sum is σ = 7771190196. Its totient is φ = 6238395360.

The previous prime is 6983549483. The next prime is 6983549549. The reversal of 6983549521 is 1259453896.

It can be written as a sum of positive squares in 2 ways, for example, as 3306825025 + 3676724496 = 57505^2 + 60636^2 .

It is not a de Polignac number, because 6983549521 - 2¹³ = 6983541329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6983549591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267006 + ... + 291991.

It is an arithmetic number, because the mean of its divisors is an integer number (647599183).

Almost surely, 2^6983549521 is an apocalyptic number.

It is an amenable number.

6983549521 is a deficient number, since it is larger than the sum of its proper divisors (787640675).

6983549521 is a wasteful number, since it uses less digits than its factorization.

6983549521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559072 (or 559041 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 52.

The square root of 6983549521 is about 83567.6344106975. The cubic root of 6983549521 is about 1911.4315009803.

The spelling of 6983549521 in words is "six billion, nine hundred eighty-three million, five hundred forty-nine thousand, five hundred twenty-one".