194371189 has 2 divisors, whose sum is σ = 194371190. Its totient is φ = 194371188.

The previous prime is 194371157. The next prime is 194371211. The reversal of 194371189 is 981173491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117896164 + 76475025 = 10858^2 + 8745^2 .

It is a cyclic number.

It is not a de Polignac number, because 194371189 - 2⁵ = 194371157 is a prime.

It is a super-2 number, since 2×194371189² = 75560318226547442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194371109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97185594 + 97185595.

It is an arithmetic number, because the mean of its divisors is an integer number (97185595).

Almost surely, 2^194371189 is an apocalyptic number.

It is an amenable number.

194371189 is a deficient number, since it is larger than the sum of its proper divisors (1).

194371189 is an equidigital number, since it uses as much as digits as its factorization.

194371189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 43.

The square root of 194371189 is about 13941.7068180334. The cubic root of 194371189 is about 579.2650113303.

The spelling of 194371189 in words is "one hundred ninety-four million, three hundred seventy-one thousand, one hundred eighty-nine".