194268743897 has 4 divisors (see below), whose sum is σ = 197168277456. Its totient is φ = 191369210340.

The previous prime is 194268743849. The next prime is 194268743899. The reversal of 194268743897 is 798347862491.

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: 798347862491 = 7681 ⋅103938011.

It is a cyclic number.

It is not a de Polignac number, because 194268743897 - 2¹² = 194268739801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194268743899) 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, 1449766679 + ... + 1449766812.

It is an arithmetic number, because the mean of its divisors is an integer number (49292069364).

Almost surely, 2^194268743897 is an apocalyptic number.

It is an amenable number.

194268743897 is a deficient number, since it is larger than the sum of its proper divisors (2899533559).

194268743897 is an equidigital number, since it uses as much as digits as its factorization.

194268743897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2899533558.

The product of its digits is 146313216, while the sum is 68.

The spelling of 194268743897 in words is "one hundred ninety-four billion, two hundred sixty-eight million, seven hundred forty-three thousand, eight hundred ninety-seven".