647011625 has 24 divisors (see below), whose sum is σ = 870963912. Its totient is φ = 477036000.

The previous prime is 647011621. The next prime is 647011639. The reversal of 647011625 is 526110746.

It can be written as a sum of positive squares in 4 ways, for example, as 101929216 + 545082409 = 10096^2 + 23347^2 .

It is not a de Polignac number, because 647011625 - 2² = 647011621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647011591 and 647011600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647011621) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1025060 + ... + 1025690.

It is an arithmetic number, because the mean of its divisors is an integer number (36290163).

Almost surely, 2^647011625 is an apocalyptic number.

647011625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

647011625 is a deficient number, since it is larger than the sum of its proper divisors (223952287).

647011625 is an frugal number, since it uses more digits than its factorization.

647011625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 647011625 is about 25436.4231958819. The cubic root of 647011625 is about 864.9095542885.

The spelling of 647011625 in words is "six hundred forty-seven million, eleven thousand, six hundred twenty-five".