1994267979 has 16 divisors (see below), whose sum is σ = 3223059840. Its totient is φ = 1208647080.

The previous prime is 1994267963. The next prime is 1994268013. The reversal of 1994267979 is 9797624991.

It is not a de Polignac number, because 1994267979 - 2⁴ = 1994267963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1994267929) 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 15 ways as a sum of consecutive naturals, for example, 3357057 + ... + 3357650.

It is an arithmetic number, because the mean of its divisors is an integer number (201441240).

Almost surely, 2^1994267979 is an apocalyptic number.

1994267979 is a deficient number, since it is larger than the sum of its proper divisors (1228791861).

1994267979 is a wasteful number, since it uses less digits than its factorization.

1994267979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714727 (or 6714721 counting only the distinct ones).

The product of its digits is 15431472, while the sum is 63.

The square root of 1994267979 is about 44657.2276233086. The cubic root of 1994267979 is about 1258.7162491842.

The spelling of 1994267979 in words is "one billion, nine hundred ninety-four million, two hundred sixty-seven thousand, nine hundred seventy-nine".