195677947 has 2 divisors, whose sum is σ = 195677948. Its totient is φ = 195677946.

The previous prime is 195677899. The next prime is 195677957. The reversal of 195677947 is 749776591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195677947 - 2²³ = 187289339 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195677957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97838973 + 97838974.

It is an arithmetic number, because the mean of its divisors is an integer number (97838974).

Almost surely, 2^195677947 is an apocalyptic number.

195677947 is a deficient number, since it is larger than the sum of its proper divisors (1).

195677947 is an equidigital number, since it uses as much as digits as its factorization.

195677947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3333960, while the sum is 55.

The square root of 195677947 is about 13988.4933784879. The cubic root of 195677947 is about 580.5602464128.

The spelling of 195677947 in words is "one hundred ninety-five million, six hundred seventy-seven thousand, nine hundred forty-seven".