647102068 has 6 divisors (see below), whose sum is σ = 1132428626. Its totient is φ = 323551032.

The previous prime is 647102039. The next prime is 647102077. The reversal of 647102068 is 860201746.

It can be written as a sum of positive squares in only one way, i.e., 493639524 + 153462544 = 22218^2 + 12388^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80887755 + ... + 80887762.

Almost surely, 2^647102068 is an apocalyptic number.

It is an amenable number.

647102068 is a deficient number, since it is larger than the sum of its proper divisors (485326558).

647102068 is a wasteful number, since it uses less digits than its factorization.

647102068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161775521 (or 161775519 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 647102068 is about 25438.2009584011. The cubic root of 647102068 is about 864.9498530854.

The spelling of 647102068 in words is "six hundred forty-seven million, one hundred two thousand, sixty-eight".