1001961843 has 8 divisors (see below), whose sum is σ = 1338035856. Its totient is φ = 666931200.

The previous prime is 1001961841. The next prime is 1001961913. The reversal of 1001961843 is 3481691001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1001961843 - 2¹ = 1001961841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001961841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258598 + ... + 262443.

It is an arithmetic number, because the mean of its divisors is an integer number (167254482).

Almost surely, 2^1001961843 is an apocalyptic number.

1001961843 is a deficient number, since it is larger than the sum of its proper divisors (336074013).

1001961843 is an equidigital number, since it uses as much as digits as its factorization.

1001961843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521685.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1001961843 is about 31653.7808642190. The cubic root of 1001961843 is about 1000.6535204846.

The spelling of 1001961843 in words is "one billion, one million, nine hundred sixty-one thousand, eight hundred forty-three".