2142983947 has 4 divisors (see below), whose sum is σ = 2307828880. Its totient is φ = 1978139016.

The previous prime is 2142983917. The next prime is 2142983959. The reversal of 2142983947 is 7493892412.

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

It is a cyclic number.

It is not a de Polignac number, because 2142983947 - 2¹⁹ = 2142459659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2142983947.

It is not an unprimeable number, because it can be changed into a prime (2142983917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82422447 + ... + 82422472.

It is an arithmetic number, because the mean of its divisors is an integer number (576957220).

Almost surely, 2^2142983947 is an apocalyptic number.

2142983947 is a deficient number, since it is larger than the sum of its proper divisors (164844933).

2142983947 is a wasteful number, since it uses less digits than its factorization.

2142983947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164844932.

The product of its digits is 870912, while the sum is 49.

The square root of 2142983947 is about 46292.3746096482. The cubic root of 2142983947 is about 1289.2574191033.

The spelling of 2142983947 in words is "two billion, one hundred forty-two million, nine hundred eighty-three thousand, nine hundred forty-seven".