194423401 has 2 divisors, whose sum is σ = 194423402. Its totient is φ = 194423400.

The previous prime is 194423399. The next prime is 194423417. The reversal of 194423401 is 104324491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159896025 + 34527376 = 12645^2 + 5876^2 .

It is an emirp because it is prime and its reverse (104324491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194423401 - 2¹ = 194423399 is a prime.

Together with 194423399, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194423401.

It is not a weakly prime, because it can be changed into another prime (194423431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97211700 + 97211701.

It is an arithmetic number, because the mean of its divisors is an integer number (97211701).

Almost surely, 2^194423401 is an apocalyptic number.

It is an amenable number.

194423401 is a deficient number, since it is larger than the sum of its proper divisors (1).

194423401 is an equidigital number, since it uses as much as digits as its factorization.

194423401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 194423401 is about 13943.5792033466. The cubic root of 194423401 is about 579.3168740870.

Adding to 194423401 its reverse (104324491), we get a palindrome (298747892).

The spelling of 194423401 in words is "one hundred ninety-four million, four hundred twenty-three thousand, four hundred one".