197674719201689 has 2 divisors, whose sum is σ = 197674719201690. Its totient is φ = 197674719201688.

The previous prime is 197674719201683. The next prime is 197674719201853. The reversal of 197674719201689 is 986102917476791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162348243144025 + 35326476057664 = 12741595^2 + 5943608^2 .

It is a cyclic number.

It is not a de Polignac number, because 197674719201689 - 2⁴⁴ = 180082533157273 is a prime.

It is a super-2 number, since 2×197674719201689² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (197674719201683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98837359600844 + 98837359600845.

It is an arithmetic number, because the mean of its divisors is an integer number (98837359600845).

Almost surely, 2^{197674719201689} is an apocalyptic number.

It is an amenable number.

197674719201689 is a deficient number, since it is larger than the sum of its proper divisors (1).

197674719201689 is an equidigital number, since it uses as much as digits as its factorization.

197674719201689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576108288, while the sum is 77.

The spelling of 197674719201689 in words is "one hundred ninety-seven trillion, six hundred seventy-four billion, seven hundred nineteen million, two hundred one thousand, six hundred eighty-nine".