647716325 has 24 divisors (see below), whose sum is σ = 834041856. Its totient is φ = 498456000.

The previous prime is 647716309. The next prime is 647716369. The reversal of 647716325 is 523617746.

It is not a de Polignac number, because 647716325 - 2⁴ = 647716309 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

Its product of digits (211680) is a multiple of the sum of its prime divisors (5040).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131660 + ... + 136490.

It is an arithmetic number, because the mean of its divisors is an integer number (34751744).

Almost surely, 2^647716325 is an apocalyptic number.

It is an amenable number.

647716325 is a deficient number, since it is larger than the sum of its proper divisors (186325531).

647716325 is a wasteful number, since it uses less digits than its factorization.

647716325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045 (or 5040 counting only the distinct ones).

The product of its digits is 211680, while the sum is 41.

The square root of 647716325 is about 25450.2716095526. The cubic root of 647716325 is about 865.2234490168.

The spelling of 647716325 in words is "six hundred forty-seven million, seven hundred sixteen thousand, three hundred twenty-five".