194422857 has 4 divisors (see below), whose sum is σ = 259230480. Its totient is φ = 129615236.

The previous prime is 194422849. The next prime is 194422859. The reversal of 194422857 is 758224491.

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.

It is a cyclic number.

It is not a de Polignac number, because 194422857 - 2³ = 194422849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194422859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32403807 + ... + 32403812.

It is an arithmetic number, because the mean of its divisors is an integer number (64807620).

Almost surely, 2^194422857 is an apocalyptic number.

It is an amenable number.

194422857 is a deficient number, since it is larger than the sum of its proper divisors (64807623).

194422857 is an equidigital number, since it uses as much as digits as its factorization.

194422857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64807622.

The product of its digits is 161280, while the sum is 42.

The square root of 194422857 is about 13943.5596961465. The cubic root of 194422857 is about 579.3163337737.

The spelling of 194422857 in words is "one hundred ninety-four million, four hundred twenty-two thousand, eight hundred fifty-seven".