195477973 has 2 divisors, whose sum is σ = 195477974. Its totient is φ = 195477972.

The previous prime is 195477937. The next prime is 195478001. The reversal of 195477973 is 379774591.

Together with previous prime (195477937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125955729 + 69522244 = 11223^2 + 8338^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195477973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195477973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195477923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97738986 + 97738987.

It is an arithmetic number, because the mean of its divisors is an integer number (97738987).

Almost surely, 2^195477973 is an apocalyptic number.

It is an amenable number.

195477973 is a deficient number, since it is larger than the sum of its proper divisors (1).

195477973 is an equidigital number, since it uses as much as digits as its factorization.

195477973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980, while the sum is 52.

The square root of 195477973 is about 13981.3437480093. The cubic root of 195477973 is about 580.3624102445.

The spelling of 195477973 in words is "one hundred ninety-five million, four hundred seventy-seven thousand, nine hundred seventy-three".