861334756397 has 2 divisors, whose sum is σ = 861334756398. Its totient is φ = 861334756396.

The previous prime is 861334756391. The next prime is 861334756423. The reversal of 861334756397 is 793657433168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 853838833156 + 7495923241 = 924034^2 + 86579^2 .

It is a cyclic number.

It is not a de Polignac number, because 861334756397 - 2⁶ = 861334756333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861334756391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430667378198 + 430667378199.

It is an arithmetic number, because the mean of its divisors is an integer number (430667378199).

Almost surely, 2^861334756397 is an apocalyptic number.

It is an amenable number.

861334756397 is a deficient number, since it is larger than the sum of its proper divisors (1).

861334756397 is an equidigital number, since it uses as much as digits as its factorization.

861334756397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 62.

The spelling of 861334756397 in words is "eight hundred sixty-one billion, three hundred thirty-four million, seven hundred fifty-six thousand, three hundred ninety-seven".