647334775 has 6 divisors (see below), whose sum is σ = 802695152. Its totient is φ = 517867800.

The previous prime is 647334767. The next prime is 647334803. The reversal of 647334775 is 577433746.

It is not a de Polignac number, because 647334775 - 2³ = 647334767 is a prime.

It is a Duffinian number.

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 in 5 ways as a sum of consecutive naturals, for example, 12946671 + ... + 12946720.

Almost surely, 2^647334775 is an apocalyptic number.

647334775 is a deficient number, since it is larger than the sum of its proper divisors (155360377).

647334775 is a wasteful number, since it uses less digits than its factorization.

647334775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25893401 (or 25893396 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 46.

The square root of 647334775 is about 25442.7745145847. The cubic root of 647334775 is about 865.0535233679.

The spelling of 647334775 in words is "six hundred forty-seven million, three hundred thirty-four thousand, seven hundred seventy-five".