1994424305 has 4 divisors (see below), whose sum is σ = 2393309172. Its totient is φ = 1595539440.

The previous prime is 1994424269. The next prime is 1994424353. The reversal of 1994424305 is 5034244991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1122049009 + 872375296 = 33497^2 + 29536^2 .

It is not a de Polignac number, because 1994424305 - 2²⁰ = 1993375729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199442426 + ... + 199442435.

It is an arithmetic number, because the mean of its divisors is an integer number (598327293).

Almost surely, 2^1994424305 is an apocalyptic number.

It is an amenable number.

1994424305 is a deficient number, since it is larger than the sum of its proper divisors (398884867).

1994424305 is an equidigital number, since it uses as much as digits as its factorization.

1994424305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398884866.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 1994424305 is about 44658.9778767943. The cubic root of 1994424305 is about 1258.7491375986.

The spelling of 1994424305 in words is "one billion, nine hundred ninety-four million, four hundred twenty-four thousand, three hundred five".