647957852 has 6 divisors (see below), whose sum is σ = 1133926248. Its totient is φ = 323978924.

The previous prime is 647957837. The next prime is 647957861. The reversal of 647957852 is 258759746.

It is a super-3 number, since 3×647957852³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 647957794 and 647957803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80994728 + ... + 80994735.

It is an arithmetic number, because the mean of its divisors is an integer number (188987708).

Almost surely, 2^647957852 is an apocalyptic number.

It is an amenable number.

647957852 is a deficient number, since it is larger than the sum of its proper divisors (485968396).

647957852 is a wasteful number, since it uses less digits than its factorization.

647957852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161989467 (or 161989465 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 53.

The square root of 647957852 is about 25455.0162443476. The cubic root of 647957852 is about 865.3309800694.

The spelling of 647957852 in words is "six hundred forty-seven million, nine hundred fifty-seven thousand, eight hundred fifty-two".