516430139 has 2 divisors, whose sum is σ = 516430140. Its totient is φ = 516430138.

The previous prime is 516430121. The next prime is 516430141. The reversal of 516430139 is 931034615.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516430139 is a prime.

Together with 516430141, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_27174551 and since 516430139 and 27174551 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (516430169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258215069 + 258215070.

It is an arithmetic number, because the mean of its divisors is an integer number (258215070).

Almost surely, 2^516430139 is an apocalyptic number.

516430139 is a deficient number, since it is larger than the sum of its proper divisors (1).

516430139 is an equidigital number, since it uses as much as digits as its factorization.

516430139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 516430139 is about 22725.0993177148. The cubic root of 516430139 is about 802.3007409582.

The spelling of 516430139 in words is "five hundred sixteen million, four hundred thirty thousand, one hundred thirty-nine".