6709411921 has 9 divisors (see below), whose sum is σ = 6784865499. Its totient is φ = 6634791000.

The previous prime is 6709411853. The next prime is 6709411931. The reversal of 6709411921 is 1291149076.

The square root of 6709411921 is 81911.

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., 6446323521 + 263088400 = 80289^2 + 16220^2 .

It is not a de Polignac number, because 6709411921 - 2²⁹ = 6172541009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6709411931) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8272606 + ... + 8273416.

Almost surely, 2^6709411921 is an apocalyptic number.

6709411921 is the 81911-st square number.

6709411921 is the 40956-th centered octagonal number.

It is an amenable number.

6709411921 is a deficient number, since it is larger than the sum of its proper divisors (75453578).

6709411921 is an frugal number, since it uses more digits than its factorization.

6709411921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The cubic root of 6709411921 is about 1886.0859735929.

The spelling of 6709411921 in words is "six billion, seven hundred nine million, four hundred eleven thousand, nine hundred twenty-one".