647906525 has 12 divisors (see below), whose sum is σ = 918176352. Its totient is φ = 444278640.

The previous prime is 647906513. The next prime is 647906531. The reversal of 647906525 is 525609746.

It is not a de Polignac number, because 647906525 - 2⁶ = 647906461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1850987 + ... + 1851336.

It is an arithmetic number, because the mean of its divisors is an integer number (76514696).

Almost surely, 2^647906525 is an apocalyptic number.

It is an amenable number.

647906525 is a deficient number, since it is larger than the sum of its proper divisors (270269827).

647906525 is a wasteful number, since it uses less digits than its factorization.

647906525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702340 (or 3702335 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 647906525 is about 25454.0080340995. The cubic root of 647906525 is about 865.3081308383.

The spelling of 647906525 in words is "six hundred forty-seven million, nine hundred six thousand, five hundred twenty-five".