520023739 has 2 divisors, whose sum is σ = 520023740. Its totient is φ = 520023738.

The previous prime is 520023709. The next prime is 520023793. The reversal of 520023739 is 937320025.

Together with next prime (520023793) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520023739 - 2¹⁵ = 519990971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520023739.

It is not a weakly prime, because it can be changed into another prime (520023709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260011869 + 260011870.

It is an arithmetic number, because the mean of its divisors is an integer number (260011870).

Almost surely, 2^520023739 is an apocalyptic number.

520023739 is a deficient number, since it is larger than the sum of its proper divisors (1).

520023739 is an equidigital number, since it uses as much as digits as its factorization.

520023739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 520023739 is about 22804.0290080503. The cubic root of 520023739 is about 804.1573884558.

The spelling of 520023739 in words is "five hundred twenty million, twenty-three thousand, seven hundred thirty-nine".