810133139 has 2 divisors, whose sum is σ = 810133140. Its totient is φ = 810133138.

The previous prime is 810133111. The next prime is 810133141. The reversal of 810133139 is 931331018.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-810133139 is a prime.

Together with 810133141, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_41640617 and since 810133139 and 41640617 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 (810133739) 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, 405066569 + 405066570.

It is an arithmetic number, because the mean of its divisors is an integer number (405066570).

Almost surely, 2^810133139 is an apocalyptic number.

810133139 is a deficient number, since it is larger than the sum of its proper divisors (1).

810133139 is an equidigital number, since it uses as much as digits as its factorization.

810133139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 810133139 is about 28462.8378592157. The cubic root of 810133139 is about 932.2208223003.

The spelling of 810133139 in words is "eight hundred ten million, one hundred thirty-three thousand, one hundred thirty-nine".