194413321 has 2 divisors, whose sum is σ = 194413322. Its totient is φ = 194413320.

The previous prime is 194413313. The next prime is 194413333. The reversal of 194413321 is 123314491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130988025 + 63425296 = 11445^2 + 7964^2 .

It is a cyclic number.

It is not a de Polignac number, because 194413321 - 2³ = 194413313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194413321.

It is not a weakly prime, because it can be changed into another prime (194414321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97206660 + 97206661.

It is an arithmetic number, because the mean of its divisors is an integer number (97206661).

Almost surely, 2^194413321 is an apocalyptic number.

It is an amenable number.

194413321 is a deficient number, since it is larger than the sum of its proper divisors (1).

194413321 is an equidigital number, since it uses as much as digits as its factorization.

194413321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 194413321 is about 13943.2177419705. The cubic root of 194413321 is about 579.3068622349.

The spelling of 194413321 in words is "one hundred ninety-four million, four hundred thirteen thousand, three hundred twenty-one".