520772139 has 16 divisors (see below), whose sum is σ = 778346400. Its totient is φ = 344107008.

The previous prime is 520772137. The next prime is 520772177. The reversal of 520772139 is 931277025.

It is not a de Polignac number, because 520772139 - 2¹ = 520772137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520772137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82294 + ... + 88395.

It is an arithmetic number, because the mean of its divisors is an integer number (48646650).

Almost surely, 2^520772139 is an apocalyptic number.

520772139 is a deficient number, since it is larger than the sum of its proper divisors (257574261).

520772139 is a wasteful number, since it uses less digits than its factorization.

520772139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170811 (or 170805 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 520772139 is about 22820.4324893285. The cubic root of 520772139 is about 804.5429752816.

The spelling of 520772139 in words is "five hundred twenty million, seven hundred seventy-two thousand, one hundred thirty-nine".