194374249 has 2 divisors, whose sum is σ = 194374250. Its totient is φ = 194374248.

The previous prime is 194374241. The next prime is 194374259. The reversal of 194374249 is 942473491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132987024 + 61387225 = 11532^2 + 7835^2 .

It is an emirp because it is prime and its reverse (942473491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194374249 - 2³ = 194374241 is a prime.

It is not a weakly prime, because it can be changed into another prime (194374241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97187124 + 97187125.

It is an arithmetic number, because the mean of its divisors is an integer number (97187125).

Almost surely, 2^194374249 is an apocalyptic number.

It is an amenable number.

194374249 is a deficient number, since it is larger than the sum of its proper divisors (1).

194374249 is an equidigital number, since it uses as much as digits as its factorization.

194374249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 194374249 is about 13941.8165602622. The cubic root of 194374249 is about 579.2680511183.

The spelling of 194374249 in words is "one hundred ninety-four million, three hundred seventy-four thousand, two hundred forty-nine".