6329952721 has 3 divisors (see below), whose sum is σ = 6330032283. Its totient is φ = 6329873160.

The previous prime is 6329952691. The next prime is 6329952743. The reversal of 6329952721 is 1272599236.

The square root of 6329952721 is 79561.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 954130321 + 5375822400 = 30889^2 + 73320^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6329952721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6329952781) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 39781 + ... + 119341.

It is an arithmetic number, because the mean of its divisors is an integer number (2110010761).

Almost surely, 2^6329952721 is an apocalyptic number.

6329952721 is the 79561-st square number.

6329952721 is the 39781-st centered octagonal number.

It is an amenable number.

6329952721 is a deficient number, since it is larger than the sum of its proper divisors (79562).

6329952721 is an frugal number, since it uses more digits than its factorization.

6329952721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159122 (or 79561 counting only the distinct ones).

The product of its digits is 408240, while the sum is 46.

The cubic root of 6329952721 is about 1849.8371145609.

The spelling of 6329952721 in words is "six billion, three hundred twenty-nine million, nine hundred fifty-two thousand, seven hundred twenty-one".