1996706021 has 2 divisors, whose sum is σ = 1996706022. Its totient is φ = 1996706020.

The previous prime is 1996706009. The next prime is 1996706051. The reversal of 1996706021 is 1206076991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1654048900 + 342657121 = 40670^2 + 18511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1996706021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1996706021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1996706051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998353010 + 998353011.

It is an arithmetic number, because the mean of its divisors is an integer number (998353011).

Almost surely, 2^1996706021 is an apocalyptic number.

It is an amenable number.

1996706021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996706021 is an equidigital number, since it uses as much as digits as its factorization.

1996706021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 1996706021 is about 44684.5165689414. The cubic root of 1996706021 is about 1259.2289775637.

The spelling of 1996706021 in words is "one billion, nine hundred ninety-six million, seven hundred six thousand, twenty-one".