195774937 has 2 divisors, whose sum is σ = 195774938. Its totient is φ = 195774936.

The previous prime is 195774923. The next prime is 195774947. The reversal of 195774937 is 739477591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186158736 + 9616201 = 13644^2 + 3101^2 .

It is an emirp because it is prime and its reverse (739477591) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195774937 is a prime.

It is not a weakly prime, because it can be changed into another prime (195774947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97887468 + 97887469.

It is an arithmetic number, because the mean of its divisors is an integer number (97887469).

Almost surely, 2^195774937 is an apocalyptic number.

It is an amenable number.

195774937 is a deficient number, since it is larger than the sum of its proper divisors (1).

195774937 is an equidigital number, since it uses as much as digits as its factorization.

195774937 is an evil number, because the sum of its binary digits is even.

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

The square root of 195774937 is about 13991.9597269289. The cubic root of 195774937 is about 580.6561509989.

The spelling of 195774937 in words is "one hundred ninety-five million, seven hundred seventy-four thousand, nine hundred thirty-seven".