1994819775 has 72 divisors (see below), whose sum is σ = 3671796240. Its totient is φ = 949939200.

The previous prime is 1994819767. The next prime is 1994819779. The reversal of 1994819775 is 5779184991.

It is not a de Polignac number, because 1994819775 - 2³ = 1994819767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994819779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 935911 + ... + 938039.

It is an arithmetic number, because the mean of its divisors is an integer number (50997170).

Almost surely, 2^1994819775 is an apocalyptic number.

1994819775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1994819775 is a deficient number, since it is larger than the sum of its proper divisors (1676976465).

1994819775 is a wasteful number, since it uses less digits than its factorization.

1994819775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217 (or 2181 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 60.

The square root of 1994819775 is about 44663.4053224785. The cubic root of 1994819775 is about 1258.8323302976.

The spelling of 1994819775 in words is "one billion, nine hundred ninety-four million, eight hundred nineteen thousand, seven hundred seventy-five".