168773379869 has 2 divisors, whose sum is σ = 168773379870. Its totient is φ = 168773379868.

The previous prime is 168773379839. The next prime is 168773379871. The reversal of 168773379869 is 968973377861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103193852644 + 65579527225 = 321238^2 + 256085^2 .

It is a cyclic number.

It is not a de Polignac number, because 168773379869 - 2²⁰ = 168772331293 is a prime.

It is a super-2 number, since 2×168773379869² (a number of 23 digits) contains 22 as substring.

Together with 168773379871, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 168773379796 and 168773379805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168773379839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84386689934 + 84386689935.

It is an arithmetic number, because the mean of its divisors is an integer number (84386689935).

Almost surely, 2^168773379869 is an apocalyptic number.

It is an amenable number.

168773379869 is a deficient number, since it is larger than the sum of its proper divisors (1).

168773379869 is an equidigital number, since it uses as much as digits as its factorization.

168773379869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576108288, while the sum is 74.

The spelling of 168773379869 in words is "one hundred sixty-eight billion, seven hundred seventy-three million, three hundred seventy-nine thousand, eight hundred sixty-nine".