1969847842 has 4 divisors (see below), whose sum is σ = 2954771766. Its totient is φ = 984923920.

The previous prime is 1969847839. The next prime is 1969847863. The reversal of 1969847842 is 2487489691.

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

It can be written as a sum of positive squares in only one way, i.e., 1661459121 + 308388721 = 40761^2 + 17561^2 .

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, 492461959 + ... + 492461962.

Almost surely, 2^1969847842 is an apocalyptic number.

1969847842 is a deficient number, since it is larger than the sum of its proper divisors (984923924).

1969847842 is an equidigital number, since it uses as much as digits as its factorization.

1969847842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984923923.

The product of its digits is 6967296, while the sum is 58.

The square root of 1969847842 is about 44382.9679268974. The cubic root of 1969847842 is about 1253.5574059131.

The spelling of 1969847842 in words is "one billion, nine hundred sixty-nine million, eight hundred forty-seven thousand, eight hundred forty-two".