507643 has 4 divisors (see below), whose sum is σ = 511200. Its totient is φ = 504088.

The previous prime is 507641. The next prime is 507667. The reversal of 507643 is 346705.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346705 = 5 ⋅69341.

It is a cyclic number.

It is not a de Polignac number, because 507643 - 2¹ = 507641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (507641) 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, 1555 + ... + 1852.

It is an arithmetic number, because the mean of its divisors is an integer number (127800).

2⁵⁰⁷⁶⁴³ is an apocalyptic number.

507643 is a deficient number, since it is larger than the sum of its proper divisors (3557).

507643 is a wasteful number, since it uses less digits than its factorization.

507643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 507643 is about 712.4907016937. The cubic root of 507643 is about 79.7724261573.

The spelling of 507643 in words is "five hundred seven thousand, six hundred forty-three".