194242532917 has 2 divisors, whose sum is σ = 194242532918. Its totient is φ = 194242532916.

The previous prime is 194242532909. The next prime is 194242532951. The reversal of 194242532917 is 719235242491.

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., 192888734481 + 1353798436 = 439191^2 + 36794^2 .

It is a cyclic number.

It is not a de Polignac number, because 194242532917 - 2³ = 194242532909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194242532977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97121266458 + 97121266459.

It is an arithmetic number, because the mean of its divisors is an integer number (97121266459).

Almost surely, 2^194242532917 is an apocalyptic number.

It is an amenable number.

194242532917 is a deficient number, since it is larger than the sum of its proper divisors (1).

194242532917 is an equidigital number, since it uses as much as digits as its factorization.

194242532917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The spelling of 194242532917 in words is "one hundred ninety-four billion, two hundred forty-two million, five hundred thirty-two thousand, nine hundred seventeen".