197742416369 has 2 divisors, whose sum is σ = 197742416370. Its totient is φ = 197742416368.

The previous prime is 197742416359. The next prime is 197742416471. The reversal of 197742416369 is 963614247791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191861520400 + 5880895969 = 438020^2 + 76687^2 .

It is a cyclic number.

It is not a de Polignac number, because 197742416369 - 2¹⁶ = 197742350833 is a prime.

It is a super-2 number, since 2×197742416369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (197742416359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98871208184 + 98871208185.

It is an arithmetic number, because the mean of its divisors is an integer number (98871208185).

Almost surely, 2^197742416369 is an apocalyptic number.

It is an amenable number.

197742416369 is a deficient number, since it is larger than the sum of its proper divisors (1).

197742416369 is an equidigital number, since it uses as much as digits as its factorization.

197742416369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 59.

The spelling of 197742416369 in words is "one hundred ninety-seven billion, seven hundred forty-two million, four hundred sixteen thousand, three hundred sixty-nine".