647055125 has 16 divisors (see below), whose sum is σ = 808529904. Its totient is φ = 517000000.

The previous prime is 647055091. The next prime is 647055133. The reversal of 647055125 is 521550746.

It can be written as a sum of positive squares in 8 ways, for example, as 30724849 + 616330276 = 5543^2 + 24826^2 .

It is not a de Polignac number, because 647055125 - 2⁶ = 647055061 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114875 + ... + 120375.

It is an arithmetic number, because the mean of its divisors is an integer number (50533119).

Almost surely, 2^647055125 is an apocalyptic number.

It is an amenable number.

647055125 is a deficient number, since it is larger than the sum of its proper divisors (161474779).

647055125 is an equidigital number, since it uses as much as digits as its factorization.

647055125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6457 (or 6447 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 647055125 is about 25437.2782545617. The cubic root of 647055125 is about 864.9289371048.

The spelling of 647055125 in words is "six hundred forty-seven million, fifty-five thousand, one hundred twenty-five".