194904489 has 24 divisors (see below), whose sum is σ = 296225760. Its totient is φ = 113622912.

The previous prime is 194904481. The next prime is 194904491. The reversal of 194904489 is 984409491.

It is a happy number.

It is not a de Polignac number, because 194904489 - 2³ = 194904481 is a prime.

It is a super-2 number, since 2×194904489² = 75975519664702242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194904481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 484 + ... + 19749.

It is an arithmetic number, because the mean of its divisors is an integer number (12342740).

Almost surely, 2^194904489 is an apocalyptic number.

194904489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

194904489 is a deficient number, since it is larger than the sum of its proper divisors (101321271).

194904489 is a wasteful number, since it uses less digits than its factorization.

194904489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20281 (or 20268 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 194904489 is about 13960.8197825199. The cubic root of 194904489 is about 579.7943077591.

The spelling of 194904489 in words is "one hundred ninety-four million, nine hundred four thousand, four hundred eighty-nine".