6837470721 has 27 divisors (see below), whose sum is σ = 10127169507. Its totient is φ = 4445360640.

The previous prime is 6837470719. The next prime is 6837470741. The reversal of 6837470721 is 1270747386.

The square root of 6837470721 is 82689.

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

It can be written as a sum of positive squares in only one way, i.e., 6171830721 + 665640000 = 78561^2 + 25800^2 .

It is not a de Polignac number, because 6837470721 - 2¹ = 6837470719 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6837470711) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10666561 + ... + 10667201.

Almost surely, 2^6837470721 is an apocalyptic number.

6837470721 is the 82689-th square number.

6837470721 is the 41345-th centered octagonal number.

It is an amenable number.

6837470721 is a deficient number, since it is larger than the sum of its proper divisors (3289698786).

6837470721 is an frugal number, since it uses more digits than its factorization.

6837470721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The cubic root of 6837470721 is about 1898.0099867044.

The spelling of 6837470721 in words is "six billion, eight hundred thirty-seven million, four hundred seventy thousand, seven hundred twenty-one".