647877339 has 16 divisors (see below), whose sum is σ = 990781440. Its totient is φ = 417984840.

The previous prime is 647877331. The next prime is 647877359. The reversal of 647877339 is 933778746.

It is a happy number.

It is not a de Polignac number, because 647877339 - 2³ = 647877331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647877331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386187 + ... + 387860.

It is an arithmetic number, because the mean of its divisors is an integer number (61923840).

Almost surely, 2^647877339 is an apocalyptic number.

647877339 is a deficient number, since it is larger than the sum of its proper divisors (342904101).

647877339 is a wasteful number, since it uses less digits than its factorization.

647877339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774087 (or 774081 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 54.

The square root of 647877339 is about 25453.4347191101. The cubic root of 647877339 is about 865.2951375739.

The spelling of 647877339 in words is "six hundred forty-seven million, eight hundred seventy-seven thousand, three hundred thirty-nine".