647427 has 16 divisors (see below), whose sum is σ = 983808. Its totient is φ = 374880.

The previous prime is 647417. The next prime is 647429. The reversal of 647427 is 724746.

It is not a de Polignac number, because 647427 - 2⁶ = 647363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647394 and 647403.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647427.

It is not an unprimeable number, because it can be changed into a prime (647429) 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, 333 + ... + 1185.

It is an arithmetic number, because the mean of its divisors is an integer number (61488).

2⁶⁴⁷⁴²⁷ is an apocalyptic number.

647427 is a deficient number, since it is larger than the sum of its proper divisors (336381).

647427 is a wasteful number, since it uses less digits than its factorization.

647427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890.

The product of its digits is 9408, while the sum is 30.

The square root of 647427 is about 804.6284857001. The cubic root of 647427 is about 86.5094602459.

The spelling of 647427 in words is "six hundred forty-seven thousand, four hundred twenty-seven".