197643374941 has 2 divisors, whose sum is σ = 197643374942. Its totient is φ = 197643374940.

The previous prime is 197643374927. The next prime is 197643374963. The reversal of 197643374941 is 149473346791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197643374041 + 900 = 444571^2 + 30^2 .

It is an emirp because it is prime and its reverse (149473346791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197643374941 - 2⁷ = 197643374813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197643174941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98821687470 + 98821687471.

It is an arithmetic number, because the mean of its divisors is an integer number (98821687471).

Almost surely, 2^197643374941 is an apocalyptic number.

It is an amenable number.

197643374941 is a deficient number, since it is larger than the sum of its proper divisors (1).

197643374941 is an equidigital number, since it uses as much as digits as its factorization.

197643374941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 58.

The spelling of 197643374941 in words is "one hundred ninety-seven billion, six hundred forty-three million, three hundred seventy-four thousand, nine hundred forty-one".