1020971843 has 4 divisors (see below), whose sum is σ = 1021723368. Its totient is φ = 1020220320.

The previous prime is 1020971801. The next prime is 1020971881. The reversal of 1020971843 is 3481790201.

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 1020971843 - 2¹² = 1020967747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020971893) 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, 373721 + ... + 376442.

It is an arithmetic number, because the mean of its divisors is an integer number (255430842).

Almost surely, 2^1020971843 is an apocalyptic number.

1020971843 is a deficient number, since it is larger than the sum of its proper divisors (751525).

1020971843 is an equidigital number, since it uses as much as digits as its factorization.

1020971843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751524.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1020971843 is about 31952.6500152961. The cubic root of 1020971843 is about 1006.9423071748.

The spelling of 1020971843 in words is "one billion, twenty million, nine hundred seventy-one thousand, eight hundred forty-three".