1996567813 has 2 divisors, whose sum is σ = 1996567814. Its totient is φ = 1996567812.

The previous prime is 1996567777. The next prime is 1996567829. The reversal of 1996567813 is 3187656991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1616200804 + 380367009 = 40202^2 + 19503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1996567813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1996567213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998283906 + 998283907.

It is an arithmetic number, because the mean of its divisors is an integer number (998283907).

Almost surely, 2^1996567813 is an apocalyptic number.

It is an amenable number.

1996567813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996567813 is an equidigital number, since it uses as much as digits as its factorization.

1996567813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 55.

The square root of 1996567813 is about 44682.9700557159. The cubic root of 1996567813 is about 1259.1999231224.

It can be divided in two parts, 19965 and 67813, that added together give a palindrome (87778).

The spelling of 1996567813 in words is "one billion, nine hundred ninety-six million, five hundred sixty-seven thousand, eight hundred thirteen".