1981967343 has 16 divisors (see below), whose sum is σ = 2681632512. Its totient is φ = 1301832000.

The previous prime is 1981967333. The next prime is 1981967357. The reversal of 1981967343 is 3437691891.

It is not a de Polignac number, because 1981967343 - 2⁴ = 1981967327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981967333) 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 15 ways as a sum of consecutive naturals, for example, 535128 + ... + 538818.

It is an arithmetic number, because the mean of its divisors is an integer number (167602032).

Almost surely, 2^1981967343 is an apocalyptic number.

1981967343 is a deficient number, since it is larger than the sum of its proper divisors (699665169).

1981967343 is a wasteful number, since it uses less digits than its factorization.

1981967343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6286.

The product of its digits is 979776, while the sum is 51.

The square root of 1981967343 is about 44519.2918070357. The cubic root of 1981967343 is about 1256.1229913824.

The spelling of 1981967343 in words is "one billion, nine hundred eighty-one million, nine hundred sixty-seven thousand, three hundred forty-three".