194952257 has 2 divisors, whose sum is σ = 194952258. Its totient is φ = 194952256.

The previous prime is 194952229. The next prime is 194952259. The reversal of 194952257 is 752259491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150209536 + 44742721 = 12256^2 + 6689^2 .

It is an emirp because it is prime and its reverse (752259491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194952257 - 2¹⁰ = 194951233 is a prime.

Together with 194952259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194952259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97476128 + 97476129.

It is an arithmetic number, because the mean of its divisors is an integer number (97476129).

Almost surely, 2^194952257 is an apocalyptic number.

It is an amenable number.

194952257 is a deficient number, since it is larger than the sum of its proper divisors (1).

194952257 is an equidigital number, since it uses as much as digits as its factorization.

194952257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 194952257 is about 13962.5304654994. The cubic root of 194952257 is about 579.8416700208.

The spelling of 194952257 in words is "one hundred ninety-four million, nine hundred fifty-two thousand, two hundred fifty-seven".