506387 has 4 divisors (see below), whose sum is σ = 578736. Its totient is φ = 434040.

The previous prime is 506381. The next prime is 506393. The reversal of 506387 is 783605.

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

It is an interprime number because it is at equal distance from previous prime (506381) and next prime (506393).

It is a cyclic number.

It is not a de Polignac number, because 506387 - 2⁸ = 506131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36164 + ... + 36177.

It is an arithmetic number, because the mean of its divisors is an integer number (144684).

2⁵⁰⁶³⁸⁷ is an apocalyptic number.

506387 is a deficient number, since it is larger than the sum of its proper divisors (72349).

506387 is an equidigital number, since it uses as much as digits as its factorization.

506387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72348.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 506387 is about 711.6087408120. The cubic root of 506387 is about 79.7065813847.

The spelling of 506387 in words is "five hundred six thousand, three hundred eighty-seven".