195923972677 has 2 divisors, whose sum is σ = 195923972678. Its totient is φ = 195923972676.

The previous prime is 195923972663. The next prime is 195923972693. The reversal of 195923972677 is 776279329591.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184323390241 + 11600582436 = 429329^2 + 107706^2 .

It is an emirp because it is prime and its reverse (776279329591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195923972677 - 2⁷ = 195923972549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195923972617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97961986338 + 97961986339.

It is an arithmetic number, because the mean of its divisors is an integer number (97961986339).

Almost surely, 2^195923972677 is an apocalyptic number.

It is an amenable number.

195923972677 is a deficient number, since it is larger than the sum of its proper divisors (1).

195923972677 is an equidigital number, since it uses as much as digits as its factorization.

195923972677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90016920, while the sum is 67.

The spelling of 195923972677 in words is "one hundred ninety-five billion, nine hundred twenty-three million, nine hundred seventy-two thousand, six hundred seventy-seven".