197064641 has 2 divisors, whose sum is σ = 197064642. Its totient is φ = 197064640.

The previous prime is 197064619. The next prime is 197064649. The reversal of 197064641 is 146460791.

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., 101103025 + 95961616 = 10055^2 + 9796^2 .

It is an emirp because it is prime and its reverse (146460791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197064641 - 2⁶ = 197064577 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 197064595 and 197064604.

It is not a weakly prime, because it can be changed into another prime (197064649) 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, 98532320 + 98532321.

It is an arithmetic number, because the mean of its divisors is an integer number (98532321).

Almost surely, 2^197064641 is an apocalyptic number.

It is an amenable number.

197064641 is a deficient number, since it is larger than the sum of its proper divisors (1).

197064641 is an equidigital number, since it uses as much as digits as its factorization.

197064641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 197064641 is about 14037.9713990306. The cubic root of 197064641 is about 581.9284216204.

The spelling of 197064641 in words is "one hundred ninety-seven million, sixty-four thousand, six hundred forty-one".