509489137 has 4 divisors (see below), whose sum is σ = 509558260. Its totient is φ = 509420016.

The previous prime is 509489093. The next prime is 509489143. The reversal of 509489137 is 731984905.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731984905 = 5 ⋅146396981.

It can be written as a sum of positive squares in 2 ways, for example, as 329821921 + 179667216 = 18161^2 + 13404^2 .

It is a cyclic number.

It is not a de Polignac number, because 509489137 - 2¹¹ = 509487089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509489737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21978 + ... + 38755.

It is an arithmetic number, because the mean of its divisors is an integer number (127389565).

Almost surely, 2^509489137 is an apocalyptic number.

It is an amenable number.

509489137 is a deficient number, since it is larger than the sum of its proper divisors (69123).

509489137 is an equidigital number, since it uses as much as digits as its factorization.

509489137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69122.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 509489137 is about 22571.8660504620. The cubic root of 509489137 is about 798.6901152773.

The spelling of 509489137 in words is "five hundred nine million, four hundred eighty-nine thousand, one hundred thirty-seven".