197961960401 has 2 divisors, whose sum is σ = 197961960402. Its totient is φ = 197961960400.

The previous prime is 197961960347. The next prime is 197961960407. The reversal of 197961960401 is 104069169791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101318073025 + 96643887376 = 318305^2 + 310876^2 .

It is an emirp because it is prime and its reverse (104069169791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197961960401 is a prime.

It is not a weakly prime, because it can be changed into another prime (197961960407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98980980200 + 98980980201.

It is an arithmetic number, because the mean of its divisors is an integer number (98980980201).

Almost surely, 2^197961960401 is an apocalyptic number.

It is an amenable number.

197961960401 is a deficient number, since it is larger than the sum of its proper divisors (1).

197961960401 is an equidigital number, since it uses as much as digits as its factorization.

197961960401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 197961960401 in words is "one hundred ninety-seven billion, nine hundred sixty-one million, nine hundred sixty thousand, four hundred one".