194475237469 has 2 divisors, whose sum is σ = 194475237470. Its totient is φ = 194475237468.

The previous prime is 194475237443. The next prime is 194475237479. The reversal of 194475237469 is 964732574491.

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., 148695072100 + 45780165369 = 385610^2 + 213963^2 .

It is a cyclic number.

It is not a de Polignac number, because 194475237469 - 2¹⁵ = 194475204701 is a prime.

It is a super-2 number, since 2×194475237469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194475237419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97237618734 + 97237618735.

It is an arithmetic number, because the mean of its divisors is an integer number (97237618735).

Almost surely, 2^194475237469 is an apocalyptic number.

It is an amenable number.

194475237469 is a deficient number, since it is larger than the sum of its proper divisors (1).

194475237469 is an equidigital number, since it uses as much as digits as its factorization.

194475237469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 61.

The spelling of 194475237469 in words is "one hundred ninety-four billion, four hundred seventy-five million, two hundred thirty-seven thousand, four hundred sixty-nine".