566557139 has 2 divisors, whose sum is σ = 566557140. Its totient is φ = 566557138.

The previous prime is 566557109. The next prime is 566557151. The reversal of 566557139 is 931755665.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-566557139 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 566557093 and 566557102.

It is not a weakly prime, because it can be changed into another prime (566557109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283278569 + 283278570.

It is an arithmetic number, because the mean of its divisors is an integer number (283278570).

Almost surely, 2^566557139 is an apocalyptic number.

566557139 is a deficient number, since it is larger than the sum of its proper divisors (1).

566557139 is an equidigital number, since it uses as much as digits as its factorization.

566557139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 850500, while the sum is 47.

The square root of 566557139 is about 23802.4607761467. The cubic root of 566557139 is about 827.4617082648.

The spelling of 566557139 in words is "five hundred sixty-six million, five hundred fifty-seven thousand, one hundred thirty-nine".