647238353 has 2 divisors, whose sum is σ = 647238354. Its totient is φ = 647238352.

The previous prime is 647238337. The next prime is 647238379. The reversal of 647238353 is 353832746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 550747024 + 96491329 = 23468^2 + 9823^2 .

It is a cyclic number.

It is not a de Polignac number, because 647238353 - 2⁴ = 647238337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 647238353.

It is not a weakly prime, because it can be changed into another prime (647238253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323619176 + 323619177.

It is an arithmetic number, because the mean of its divisors is an integer number (323619177).

Almost surely, 2^647238353 is an apocalyptic number.

It is an amenable number.

647238353 is a deficient number, since it is larger than the sum of its proper divisors (1).

647238353 is an equidigital number, since it uses as much as digits as its factorization.

647238353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 41.

The square root of 647238353 is about 25440.8795641975. The cubic root of 647238353 is about 865.0105706661.

The spelling of 647238353 in words is "six hundred forty-seven million, two hundred thirty-eight thousand, three hundred fifty-three".