816067139 has 2 divisors, whose sum is σ = 816067140. Its totient is φ = 816067138.

The previous prime is 816067121. The next prime is 816067177. The reversal of 816067139 is 931760618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816067139 - 2⁸ = 816066883 is a prime.

It is a Chen prime.

It is equal to p_41929862 and since 816067139 and 41929862 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 816067096 and 816067105.

It is not a weakly prime, because it can be changed into another prime (816067199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408033569 + 408033570.

It is an arithmetic number, because the mean of its divisors is an integer number (408033570).

Almost surely, 2^816067139 is an apocalyptic number.

816067139 is a deficient number, since it is larger than the sum of its proper divisors (1).

816067139 is an equidigital number, since it uses as much as digits as its factorization.

816067139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 816067139 is about 28566.8888575568. Note that the first 4 decimals coincide. The cubic root of 816067139 is about 934.4913736838.

The spelling of 816067139 in words is "eight hundred sixteen million, sixty-seven thousand, one hundred thirty-nine".