194213237 has 2 divisors, whose sum is σ = 194213238. Its totient is φ = 194213236.

The previous prime is 194213197. The next prime is 194213249. The reversal of 194213237 is 732312491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189723076 + 4490161 = 13774^2 + 2119^2 .

It is a cyclic number.

It is not a de Polignac number, because 194213237 - 2²⁰ = 193164661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194213137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97106618 + 97106619.

It is an arithmetic number, because the mean of its divisors is an integer number (97106619).

Almost surely, 2^194213237 is an apocalyptic number.

It is an amenable number.

194213237 is a deficient number, since it is larger than the sum of its proper divisors (1).

194213237 is an equidigital number, since it uses as much as digits as its factorization.

194213237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 194213237 is about 13936.0409370811. The cubic root of 194213237 is about 579.1080592928.

The spelling of 194213237 in words is "one hundred ninety-four million, two hundred thirteen thousand, two hundred thirty-seven".