194409953 has 2 divisors, whose sum is σ = 194409954. Its totient is φ = 194409952.

The previous prime is 194409911. The next prime is 194409979. The reversal of 194409953 is 359904491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194407249 + 2704 = 13943^2 + 52^2 .

It is an emirp because it is prime and its reverse (359904491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194409953 - 2⁶ = 194409889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194400953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97204976 + 97204977.

It is an arithmetic number, because the mean of its divisors is an integer number (97204977).

Almost surely, 2^194409953 is an apocalyptic number.

It is an amenable number.

194409953 is a deficient number, since it is larger than the sum of its proper divisors (1).

194409953 is an equidigital number, since it uses as much as digits as its factorization.

194409953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 194409953 is about 13943.0969658824. The cubic root of 194409953 is about 579.3035169278.

The spelling of 194409953 in words is "one hundred ninety-four million, four hundred nine thousand, nine hundred fifty-three".