647253607 has 24 divisors (see below), whose sum is σ = 873832320. Its totient is φ = 465547680.

The previous prime is 647253589. The next prime is 647253611. The reversal of 647253607 is 706352746.

647253607 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-647253607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 647253607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647253667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11857 + ... + 37882.

It is an arithmetic number, because the mean of its divisors is an integer number (36409680).

Almost surely, 2^647253607 is an apocalyptic number.

647253607 is a deficient number, since it is larger than the sum of its proper divisors (226578713).

647253607 is a wasteful number, since it uses less digits than its factorization.

647253607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49783 (or 49770 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 40.

The square root of 647253607 is about 25441.1793555252. The cubic root of 647253607 is about 865.0173660852.

The spelling of 647253607 in words is "six hundred forty-seven million, two hundred fifty-three thousand, six hundred seven".