194008889 has 2 divisors, whose sum is σ = 194008890. Its totient is φ = 194008888.

The previous prime is 194008873. The next prime is 194008897. The reversal of 194008889 is 988800491.

194008889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128074489 + 65934400 = 11317^2 + 8120^2 .

It is a cyclic number.

It is not a de Polignac number, because 194008889 - 2⁴ = 194008873 is a prime.

It is a super-2 number, since 2×194008889² = 75278898022028642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194008189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97004444 + 97004445.

It is an arithmetic number, because the mean of its divisors is an integer number (97004445).

Almost surely, 2^194008889 is an apocalyptic number.

It is an amenable number.

194008889 is a deficient number, since it is larger than the sum of its proper divisors (1).

194008889 is an equidigital number, since it uses as much as digits as its factorization.

194008889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 194008889 is about 13928.7073700326. The cubic root of 194008889 is about 578.9048786638.

The spelling of 194008889 in words is "one hundred ninety-four million, eight thousand, eight hundred eighty-nine".