194494871 has 2 divisors, whose sum is σ = 194494872. Its totient is φ = 194494870.

The previous prime is 194494823. The next prime is 194494873. The reversal of 194494871 is 178494491.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194494871 is a prime.

Together with 194494873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194494873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97247435 + 97247436.

It is an arithmetic number, because the mean of its divisors is an integer number (97247436).

Almost surely, 2^194494871 is an apocalyptic number.

194494871 is a deficient number, since it is larger than the sum of its proper divisors (1).

194494871 is an equidigital number, since it uses as much as digits as its factorization.

194494871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 194494871 is about 13946.1417962102. The cubic root of 194494871 is about 579.3878509764.

The spelling of 194494871 in words is "one hundred ninety-four million, four hundred ninety-four thousand, eight hundred seventy-one".