647670553 has 8 divisors (see below), whose sum is σ = 660029760. Its totient is φ = 635357520.

The previous prime is 647670521. The next prime is 647670577. The reversal of 647670553 is 355076746.

647670553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 647670553 - 2⁵ = 647670521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647670503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17463 + ... + 40003.

It is an arithmetic number, because the mean of its divisors is an integer number (82503720).

Almost surely, 2^647670553 is an apocalyptic number.

It is an amenable number.

647670553 is a deficient number, since it is larger than the sum of its proper divisors (12359207).

647670553 is a wasteful number, since it uses less digits than its factorization.

647670553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23087.

The product of its (nonzero) digits is 529200, while the sum is 43.

The square root of 647670553 is about 25449.3723498243. The cubic root of 647670553 is about 865.2030676971.

The spelling of 647670553 in words is "six hundred forty-seven million, six hundred seventy thousand, five hundred fifty-three".