520410139 has 4 divisors (see below), whose sum is σ = 520513056. Its totient is φ = 520307224.

The previous prime is 520410119. The next prime is 520410157. The reversal of 520410139 is 931014025.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520410139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520410109) 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, 43459 + ... + 54124.

It is an arithmetic number, because the mean of its divisors is an integer number (130128264).

Almost surely, 2^520410139 is an apocalyptic number.

520410139 is a deficient number, since it is larger than the sum of its proper divisors (102917).

520410139 is an equidigital number, since it uses as much as digits as its factorization.

520410139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102916.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 520410139 is about 22812.4996219178. The cubic root of 520410139 is about 804.3565136510.

The spelling of 520410139 in words is "five hundred twenty million, four hundred ten thousand, one hundred thirty-nine".