798777121139 has 2 divisors, whose sum is σ = 798777121140. Its totient is φ = 798777121138.

The previous prime is 798777121133. The next prime is 798777121141. The reversal of 798777121139 is 931121777897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 798777121139 - 2¹⁶ = 798777055603 is a prime.

It is a Sophie Germain prime.

Together with 798777121141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (798777121133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399388560569 + 399388560570.

It is an arithmetic number, because the mean of its divisors is an integer number (399388560570).

Almost surely, 2^798777121139 is an apocalyptic number.

798777121139 is a deficient number, since it is larger than the sum of its proper divisors (1).

798777121139 is an equidigital number, since it uses as much as digits as its factorization.

798777121139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9335088, while the sum is 62.

The spelling of 798777121139 in words is "seven hundred ninety-eight billion, seven hundred seventy-seven million, one hundred twenty-one thousand, one hundred thirty-nine".