814126139 has 2 divisors, whose sum is σ = 814126140. Its totient is φ = 814126138.

The previous prime is 814126129. The next prime is 814126213. The reversal of 814126139 is 931621418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 814126139 - 2²⁰ = 813077563 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 814126099 and 814126108.

It is not a weakly prime, because it can be changed into another prime (814126129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407063069 + 407063070.

It is an arithmetic number, because the mean of its divisors is an integer number (407063070).

Almost surely, 2^814126139 is an apocalyptic number.

814126139 is a deficient number, since it is larger than the sum of its proper divisors (1).

814126139 is an equidigital number, since it uses as much as digits as its factorization.

814126139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 814126139 is about 28532.8957345728. The cubic root of 814126139 is about 933.7498955871.

The spelling of 814126139 in words is "eight hundred fourteen million, one hundred twenty-six thousand, one hundred thirty-nine".