647874 has 12 divisors (see below), whose sum is σ = 1403766. Its totient is φ = 215952.

The previous prime is 647861. The next prime is 647891. The reversal of 647874 is 478746.

It is a happy number.

647874 is a `hidden beast` number, since 647 + 8 + 7 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 431649 + 216225 = 657^2 + 465^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647874.

It is an unprimeable number.

647874 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17979 + ... + 18014.

2⁶⁴⁷⁸⁷⁴ is an apocalyptic number.

647874 is an abundant number, since it is smaller than the sum of its proper divisors (755892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647874 is a wasteful number, since it uses less digits than its factorization.

647874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36001 (or 35998 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 647874 is about 804.9062057159. The cubic root of 647874 is about 86.5293651065.

It can be divided in two parts, 647 and 874, that added together give a square (1521 = 39²).

The spelling of 647874 in words is "six hundred forty-seven thousand, eight hundred seventy-four".