646047 has 12 divisors (see below), whose sum is σ = 974064. Its totient is φ = 411840.

The previous prime is 646039. The next prime is 646067. The reversal of 646047 is 740646.

It is not a de Polignac number, because 646047 - 2³ = 646039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 646047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1354 + ... + 1767.

It is an arithmetic number, because the mean of its divisors is an integer number (81172).

2⁶⁴⁶⁰⁴⁷ is an apocalyptic number.

646047 is a deficient number, since it is larger than the sum of its proper divisors (328017).

646047 is a wasteful number, since it uses less digits than its factorization.

646047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150 (or 3147 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 646047 is about 803.7704896300. The cubic root of 646047 is about 86.4479511347.

The spelling of 646047 in words is "six hundred forty-six thousand, forty-seven".