647617039 has 2 divisors, whose sum is σ = 647617040. Its totient is φ = 647617038.

The previous prime is 647617013. The next prime is 647617073. The reversal of 647617039 is 930716746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647617039 - 2⁵ = 647617007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647616986 and 647617004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647617639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323808519 + 323808520.

It is an arithmetic number, because the mean of its divisors is an integer number (323808520).

Almost surely, 2^647617039 is an apocalyptic number.

647617039 is a deficient number, since it is larger than the sum of its proper divisors (1).

647617039 is an equidigital number, since it uses as much as digits as its factorization.

647617039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 647617039 is about 25448.3209465772. The cubic root of 647617039 is about 865.1792378080.

The spelling of 647617039 in words is "six hundred forty-seven million, six hundred seventeen thousand, thirty-nine".