187968650669 has 2 divisors, whose sum is σ = 187968650670. Its totient is φ = 187968650668.

The previous prime is 187968650579. The next prime is 187968650687. The reversal of 187968650669 is 966056869781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179428488100 + 8540162569 = 423590^2 + 92413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187968650669 is a prime.

It is a super-2 number, since 2×187968650669² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187968620669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93984325334 + 93984325335.

It is an arithmetic number, because the mean of its divisors is an integer number (93984325335).

Almost surely, 2^187968650669 is an apocalyptic number.

It is an amenable number.

187968650669 is a deficient number, since it is larger than the sum of its proper divisors (1).

187968650669 is an equidigital number, since it uses as much as digits as its factorization.

187968650669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235146240, while the sum is 71.

The spelling of 187968650669 in words is "one hundred eighty-seven billion, nine hundred sixty-eight million, six hundred fifty thousand, six hundred sixty-nine".