647362321 has 4 divisors (see below), whose sum is σ = 656230372. Its totient is φ = 638494272.

The previous prime is 647362283. The next prime is 647362327. The reversal of 647362321 is 123263746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 339886096 + 307476225 = 18436^2 + 17535^2 .

It is a cyclic number.

It is not a de Polignac number, because 647362321 - 2¹³ = 647354129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647362327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4433916 + ... + 4434061.

It is an arithmetic number, because the mean of its divisors is an integer number (164057593).

Almost surely, 2^647362321 is an apocalyptic number.

It is an amenable number.

647362321 is a deficient number, since it is larger than the sum of its proper divisors (8868051).

647362321 is an equidigital number, since it uses as much as digits as its factorization.

647362321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8868050.

The product of its digits is 36288, while the sum is 34.

The square root of 647362321 is about 25443.3158412971. The cubic root of 647362321 is about 865.0657933850.

The spelling of 647362321 in words is "six hundred forty-seven million, three hundred sixty-two thousand, three hundred twenty-one".