1996873891 has 2 divisors, whose sum is σ = 1996873892. Its totient is φ = 1996873890.

The previous prime is 1996873871. The next prime is 1996873937. The reversal of 1996873891 is 1983786991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1996873891 - 2¹¹ = 1996871843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1996873871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998436945 + 998436946.

It is an arithmetic number, because the mean of its divisors is an integer number (998436946).

Almost surely, 2^1996873891 is an apocalyptic number.

1996873891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996873891 is an equidigital number, since it uses as much as digits as its factorization.

1996873891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 61.

The square root of 1996873891 is about 44686.3949206020. The cubic root of 1996873891 is about 1259.2642658239.

The spelling of 1996873891 in words is "one billion, nine hundred ninety-six million, eight hundred seventy-three thousand, eight hundred ninety-one".