508209139 has 2 divisors, whose sum is σ = 508209140. Its totient is φ = 508209138.

The previous prime is 508209113. The next prime is 508209161. The reversal of 508209139 is 931902805.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 508209139 - 2⁹ = 508208627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 508209098 and 508209107.

It is not a weakly prime, because it can be changed into another prime (508209109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254104569 + 254104570.

It is an arithmetic number, because the mean of its divisors is an integer number (254104570).

Almost surely, 2^508209139 is an apocalyptic number.

508209139 is a deficient number, since it is larger than the sum of its proper divisors (1).

508209139 is an equidigital number, since it uses as much as digits as its factorization.

508209139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 508209139 is about 22543.4943830809. The cubic root of 508209139 is about 798.0207002333.

The spelling of 508209139 in words is "five hundred eight million, two hundred nine thousand, one hundred thirty-nine".