647495285 has 8 divisors (see below), whose sum is σ = 777959640. Its totient is φ = 517352704.

The previous prime is 647495279. The next prime is 647495293. The reversal of 647495285 is 582594746.

It can be written as a sum of positive squares in 4 ways, for example, as 163891204 + 483604081 = 12802^2 + 21991^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647495285 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75992 + ... + 84081.

It is an arithmetic number, because the mean of its divisors is an integer number (97244955).

Almost surely, 2^647495285 is an apocalyptic number.

It is an amenable number.

647495285 is a deficient number, since it is larger than the sum of its proper divisors (130464355).

647495285 is a wasteful number, since it uses less digits than its factorization.

647495285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160887.

The product of its digits is 2419200, while the sum is 50.

The square root of 647495285 is about 25445.9286527334. The cubic root of 647495285 is about 865.1250156219.

The spelling of 647495285 in words is "six hundred forty-seven million, four hundred ninety-five thousand, two hundred eighty-five".