1984742107 has 4 divisors (see below), whose sum is σ = 2053181520. Its totient is φ = 1916302696.

The previous prime is 1984742069. The next prime is 1984742113. The reversal of 1984742107 is 7012474891.

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 1984742107 - 2¹⁹ = 1984217819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1984742167) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 34219663 + ... + 34219720.

It is an arithmetic number, because the mean of its divisors is an integer number (513295380).

Almost surely, 2^1984742107 is an apocalyptic number.

1984742107 is a deficient number, since it is larger than the sum of its proper divisors (68439413).

1984742107 is an equidigital number, since it uses as much as digits as its factorization.

1984742107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68439412.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 1984742107 is about 44550.4445207901. Note that the first 3 decimals coincide. The cubic root of 1984742107 is about 1256.7089108200.

The spelling of 1984742107 in words is "one billion, nine hundred eighty-four million, seven hundred forty-two thousand, one hundred seven".