647125330 has 8 divisors (see below), whose sum is σ = 1164825612. Its totient is φ = 258850128.

The previous prime is 647125289. The next prime is 647125331. The reversal of 647125330 is 33521746.

It can be written as a sum of positive squares in 2 ways, for example, as 558896881 + 88228449 = 23641^2 + 9393^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 647125292 and 647125301.

It is not an unprimeable number, because it can be changed into a prime (647125331) 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 3 ways as a sum of consecutive naturals, for example, 32356257 + ... + 32356276.

Almost surely, 2^647125330 is an apocalyptic number.

647125330 is a deficient number, since it is larger than the sum of its proper divisors (517700282).

647125330 is a wasteful number, since it uses less digits than its factorization.

647125330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64712540.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 647125330 is about 25438.6581800220. The cubic root of 647125330 is about 864.9602173558.

The spelling of 647125330 in words is "six hundred forty-seven million, one hundred twenty-five thousand, three hundred thirty".