1994663917 has 8 divisors (see below), whose sum is σ = 2034338400. Its totient is φ = 1955185104.

The previous prime is 1994663911. The next prime is 1994663929. The reversal of 1994663917 is 7193664991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1994663917 - 2¹¹ = 1994661869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994663911) 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 7 ways as a sum of consecutive naturals, for example, 28242 + ... + 69187.

It is an arithmetic number, because the mean of its divisors is an integer number (254292300).

Almost surely, 2^1994663917 is an apocalyptic number.

It is an amenable number.

1994663917 is a deficient number, since it is larger than the sum of its proper divisors (39674483).

1994663917 is an equidigital number, since it uses as much as digits as its factorization.

1994663917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97835.

The product of its digits is 2204496, while the sum is 55.

The square root of 1994663917 is about 44661.6604818943. The cubic root of 1994663917 is about 1258.7995446793.

The spelling of 1994663917 in words is "one billion, nine hundred ninety-four million, six hundred sixty-three thousand, nine hundred seventeen".