1994279806 has 4 divisors (see below), whose sum is σ = 2991419712. Its totient is φ = 997139902.

The previous prime is 1994279789. The next prime is 1994279821. The reversal of 1994279806 is 6089724991.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498569950 + ... + 498569953.

It is an arithmetic number, because the mean of its divisors is an integer number (747854928).

Almost surely, 2^1994279806 is an apocalyptic number.

1994279806 is a deficient number, since it is larger than the sum of its proper divisors (997139906).

1994279806 is an equidigital number, since it uses as much as digits as its factorization.

1994279806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997139905.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The square root of 1994279806 is about 44657.3600428865. The cubic root of 1994279806 is about 1258.7187374502.

The spelling of 1994279806 in words is "one billion, nine hundred ninety-four million, two hundred seventy-nine thousand, eight hundred six".