197520301961 has 2 divisors, whose sum is σ = 197520301962. Its totient is φ = 197520301960.

The previous prime is 197520301949. The next prime is 197520301963. The reversal of 197520301961 is 169103025791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190903455625 + 6616846336 = 436925^2 + 81344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197520301961 is a prime.

Together with 197520301963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197520301963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98760150980 + 98760150981.

It is an arithmetic number, because the mean of its divisors is an integer number (98760150981).

Almost surely, 2^197520301961 is an apocalyptic number.

It is an amenable number.

197520301961 is a deficient number, since it is larger than the sum of its proper divisors (1).

197520301961 is an equidigital number, since it uses as much as digits as its factorization.

197520301961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 44.

The spelling of 197520301961 in words is "one hundred ninety-seven billion, five hundred twenty million, three hundred one thousand, nine hundred sixty-one".