1996437813 has 4 divisors (see below), whose sum is σ = 2661917088. Its totient is φ = 1330958540.

The previous prime is 1996437791. The next prime is 1996437827. The reversal of 1996437813 is 3187346991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1996437813 - 2⁹ = 1996437301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996437013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332739633 + ... + 332739638.

It is an arithmetic number, because the mean of its divisors is an integer number (665479272).

Almost surely, 2^1996437813 is an apocalyptic number.

It is an amenable number.

1996437813 is a deficient number, since it is larger than the sum of its proper divisors (665479275).

1996437813 is an equidigital number, since it uses as much as digits as its factorization.

1996437813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665479274.

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

The square root of 1996437813 is about 44681.5153391198. The cubic root of 1996437813 is about 1259.1725929641.

The spelling of 1996437813 in words is "one billion, nine hundred ninety-six million, four hundred thirty-seven thousand, eight hundred thirteen".