194936912869 has 4 divisors (see below), whose sum is σ = 194941171360. Its totient is φ = 194932654380.

The previous prime is 194936912867. The next prime is 194936912879. The reversal of 194936912869 is 968219639491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 968219639491 = 13 ⋅74478433807.

It is a cyclic number.

It is not a de Polignac number, because 194936912869 - 2¹ = 194936912867 is a prime.

It is a super-2 number, since 2×194936912869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194936912867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059827 + ... + 2152384.

It is an arithmetic number, because the mean of its divisors is an integer number (48735292840).

Almost surely, 2^194936912869 is an apocalyptic number.

It is an amenable number.

194936912869 is a deficient number, since it is larger than the sum of its proper divisors (4258491).

194936912869 is an equidigital number, since it uses as much as digits as its factorization.

194936912869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4258490.

The product of its digits is 45349632, while the sum is 67.

The spelling of 194936912869 in words is "one hundred ninety-four billion, nine hundred thirty-six million, nine hundred twelve thousand, eight hundred sixty-nine".