194497205873 has 4 divisors (see below), whose sum is σ = 194498715648. Its totient is φ = 194495696100.

The previous prime is 194497205869. The next prime is 194497205879. The reversal of 194497205873 is 378502794491.

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: 378502794491 = 23003 ⋅16454497.

It is a cyclic number.

It is not a de Polignac number, because 194497205873 - 2² = 194497205869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194497205879) 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, 541553 + ... + 825998.

It is an arithmetic number, because the mean of its divisors is an integer number (48624678912).

Almost surely, 2^194497205873 is an apocalyptic number.

It is an amenable number.

194497205873 is a deficient number, since it is larger than the sum of its proper divisors (1509775).

194497205873 is a wasteful number, since it uses less digits than its factorization.

194497205873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509774.

The product of its (nonzero) digits is 15240960, while the sum is 59.

The spelling of 194497205873 in words is "one hundred ninety-four billion, four hundred ninety-seven million, two hundred five thousand, eight hundred seventy-three".