647357425 has 48 divisors (see below), whose sum is σ = 984187008. Its totient is φ = 415641600.

The previous prime is 647357387. The next prime is 647357443. The reversal of 647357425 is 524753746.

It is a de Polignac number, because none of the positive numbers 2^k-647357425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78289 + ... + 86161.

It is an arithmetic number, because the mean of its divisors is an integer number (20503896).

Almost surely, 2^647357425 is an apocalyptic number.

647357425 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

647357425 is a deficient number, since it is larger than the sum of its proper divisors (336829583).

647357425 is a wasteful number, since it uses less digits than its factorization.

647357425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7930 (or 7925 counting only the distinct ones).

The product of its digits is 705600, while the sum is 43.

The square root of 647357425 is about 25443.2196272406. The cubic root of 647357425 is about 865.0636125492.

The spelling of 647357425 in words is "six hundred forty-seven million, three hundred fifty-seven thousand, four hundred twenty-five".