646007 has 4 divisors (see below), whose sum is σ = 647736. Its totient is φ = 644280.

The previous prime is 646003. The next prime is 646013. The reversal of 646007 is 700646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 646007 - 2² = 646003 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 646007.

It is not an unprimeable number, because it can be changed into a prime (646003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44 + ... + 1137.

It is an arithmetic number, because the mean of its divisors is an integer number (161934).

2⁶⁴⁶⁰⁰⁷ is an apocalyptic number.

646007 is a deficient number, since it is larger than the sum of its proper divisors (1729).

646007 is a wasteful number, since it uses less digits than its factorization.

646007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 646007 is about 803.7456065199. The cubic root of 646007 is about 86.4461669563.

The spelling of 646007 in words is "six hundred forty-six thousand, seven".