520140739 has 2 divisors, whose sum is σ = 520140740. Its totient is φ = 520140738.

The previous prime is 520140727. The next prime is 520140743. The reversal of 520140739 is 937041025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520140739 is a prime.

It is a super-2 number, since 2×520140739² = 541092776734932242, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520140739.

It is not a weakly prime, because it can be changed into another prime (520140749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260070369 + 260070370.

It is an arithmetic number, because the mean of its divisors is an integer number (260070370).

Almost surely, 2^520140739 is an apocalyptic number.

520140739 is a deficient number, since it is larger than the sum of its proper divisors (1).

520140739 is an equidigital number, since it uses as much as digits as its factorization.

520140739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 520140739 is about 22806.5941999238. The cubic root of 520140739 is about 804.2176929843.

The spelling of 520140739 in words is "five hundred twenty million, one hundred forty thousand, seven hundred thirty-nine".