506508091 has 4 divisors (see below), whose sum is σ = 513446632. Its totient is φ = 499569552.

The previous prime is 506508089. The next prime is 506508127. The reversal of 506508091 is 190805605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190805605 = 5 ⋅38161121.

It is a cyclic number.

It is not a de Polignac number, because 506508091 - 2¹ = 506508089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506508791) 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, 3469161 + ... + 3469306.

It is an arithmetic number, because the mean of its divisors is an integer number (128361658).

Almost surely, 2^506508091 is an apocalyptic number.

506508091 is a deficient number, since it is larger than the sum of its proper divisors (6938541).

506508091 is an equidigital number, since it uses as much as digits as its factorization.

506508091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6938540.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 506508091 is about 22505.7346247573. The cubic root of 506508091 is about 797.1293422049.

The spelling of 506508091 in words is "five hundred six million, five hundred eight thousand, ninety-one".