647414521 has 16 divisors (see below), whose sum is σ = 706454784. Its totient is φ = 589739904.

The previous prime is 647414513. The next prime is 647414527. The reversal of 647414521 is 125414746.

It is not a de Polignac number, because 647414521 - 2³ = 647414513 is a prime.

It is a Duffinian number.

Its product of digits (26880) is a multiple of the sum of its prime divisors (1920).

It is not an unprimeable number, because it can be changed into a prime (647414527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434640 + ... + 436126.

It is an arithmetic number, because the mean of its divisors is an integer number (44153424).

Almost surely, 2^647414521 is an apocalyptic number.

It is an amenable number.

647414521 is a deficient number, since it is larger than the sum of its proper divisors (59040263).

647414521 is a wasteful number, since it uses less digits than its factorization.

647414521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920.

The product of its digits is 26880, while the sum is 34.

The square root of 647414521 is about 25444.3416303114. The cubic root of 647414521 is about 865.0890442598.

The spelling of 647414521 in words is "six hundred forty-seven million, four hundred fourteen thousand, five hundred twenty-one".