509147 has 2 divisors, whose sum is σ = 509148. Its totient is φ = 509146.

The previous prime is 509137. The next prime is 509149. The reversal of 509147 is 741905.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 509147 - 2¹² = 505051 is a prime.

Together with 509149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (509149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254573 + 254574.

It is an arithmetic number, because the mean of its divisors is an integer number (254574).

2⁵⁰⁹¹⁴⁷ is an apocalyptic number.

509147 is a deficient number, since it is larger than the sum of its proper divisors (1).

509147 is an equidigital number, since it uses as much as digits as its factorization.

509147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 509147 is about 713.5453734697. The cubic root of 509147 is about 79.8511293911.

It can be divided in two parts, 509 and 147, that added together give a palindrome (656).

The spelling of 509147 in words is "five hundred nine thousand, one hundred forty-seven".