861374473117 has 2 divisors, whose sum is σ = 861374473118. Its totient is φ = 861374473116.

The previous prime is 861374473109. The next prime is 861374473307. The reversal of 861374473117 is 711374473168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 828693426276 + 32681046841 = 910326^2 + 180779^2 .

It is a cyclic number.

It is not a de Polignac number, because 861374473117 - 2³ = 861374473109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861374473417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430687236558 + 430687236559.

It is an arithmetic number, because the mean of its divisors is an integer number (430687236559).

Almost surely, 2^861374473117 is an apocalyptic number.

It is an amenable number.

861374473117 is a deficient number, since it is larger than the sum of its proper divisors (1).

861374473117 is an equidigital number, since it uses as much as digits as its factorization.

861374473117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2370816, while the sum is 52.

The spelling of 861374473117 in words is "eight hundred sixty-one billion, three hundred seventy-four million, four hundred seventy-three thousand, one hundred seventeen".