509379841 has 4 divisors (see below), whose sum is σ = 515103300. Its totient is φ = 503656384.

The previous prime is 509379839. The next prime is 509379847. The reversal of 509379841 is 148973905.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 334743616 + 174636225 = 18296^2 + 13215^2 .

It is a cyclic number.

It is not a de Polignac number, because 509379841 - 2¹ = 509379839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 509379791 and 509379800.

It is not an unprimeable number, because it can be changed into a prime (509379847) 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, 2861596 + ... + 2861773.

It is an arithmetic number, because the mean of its divisors is an integer number (128775825).

Almost surely, 2^509379841 is an apocalyptic number.

It is an amenable number.

509379841 is a deficient number, since it is larger than the sum of its proper divisors (5723459).

509379841 is an equidigital number, since it uses as much as digits as its factorization.

509379841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723458.

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

The square root of 509379841 is about 22569.4448536068. Note that the first 3 decimals coincide. The cubic root of 509379841 is about 798.6329993211.

The spelling of 509379841 in words is "five hundred nine million, three hundred seventy-nine thousand, eight hundred forty-one".