2809012942 has 4 divisors (see below), whose sum is σ = 4213519416. Its totient is φ = 1404506470.

The previous prime is 2809012933. The next prime is 2809012963. The reversal of 2809012942 is 2492109082.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702253234 + ... + 702253237.

It is an arithmetic number, because the mean of its divisors is an integer number (1053379854).

Almost surely, 2^2809012942 is an apocalyptic number.

2809012942 is a deficient number, since it is larger than the sum of its proper divisors (1404506474).

2809012942 is a wasteful number, since it uses less digits than its factorization.

2809012942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404506473.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 2809012942 is about 53000.1220941990. The cubic root of 2809012942 is about 1410.9704336669.

The spelling of 2809012942 in words is "two billion, eight hundred nine million, twelve thousand, nine hundred forty-two".