5747307721 has 9 divisors (see below), whose sum is σ = 5875835431. Its totient is φ = 5621537272.

The previous prime is 5747307719. The next prime is 5747307743. The reversal of 5747307721 is 1277037475.

The square root of 5747307721 is 75811.

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., 3591005625 + 2156302096 = 59925^2 + 46436^2 .

It is not a de Polignac number, because 5747307721 - 2¹ = 5747307719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5747307751) 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, 3562311 + ... + 3563923.

Almost surely, 2^5747307721 is an apocalyptic number.

5747307721 is the 75811-st square number.

5747307721 is the 37906-th centered octagonal number.

It is an amenable number.

5747307721 is a deficient number, since it is larger than the sum of its proper divisors (128527710).

5747307721 is an frugal number, since it uses more digits than its factorization.

5747307721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 288120, while the sum is 43.

The cubic root of 5747307721 is about 1791.2442812903.

The spelling of 5747307721 in words is "five billion, seven hundred forty-seven million, three hundred seven thousand, seven hundred twenty-one".