1994899633 has 4 divisors (see below), whose sum is σ = 2003461668. Its totient is φ = 1986337600.

The previous prime is 1994899609. The next prime is 1994899679. The reversal of 1994899633 is 3369984991.

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 823001344 + 1171898289 = 28688^2 + 34233^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994899633 - 2²⁹ = 1458028721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1994899603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4280668 + ... + 4281133.

It is an arithmetic number, because the mean of its divisors is an integer number (500865417).

Almost surely, 2^1994899633 is an apocalyptic number.

It is an amenable number.

1994899633 is a deficient number, since it is larger than the sum of its proper divisors (8562035).

1994899633 is an equidigital number, since it uses as much as digits as its factorization.

1994899633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8562034.

The product of its digits is 11337408, while the sum is 61.

The square root of 1994899633 is about 44664.2993116426. The cubic root of 1994899633 is about 1258.8491282213.

The spelling of 1994899633 in words is "one billion, nine hundred ninety-four million, eight hundred ninety-nine thousand, six hundred thirty-three".