1996423705 has 4 divisors (see below), whose sum is σ = 2395708452. Its totient is φ = 1597138960.

The previous prime is 1996423691. The next prime is 1996423717. The reversal of 1996423705 is 5073246991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 692058249 + 1304365456 = 26307^2 + 36116^2 .

It is not a de Polignac number, because 1996423705 - 2²¹ = 1994326553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199642366 + ... + 199642375.

It is an arithmetic number, because the mean of its divisors is an integer number (598927113).

Almost surely, 2^1996423705 is an apocalyptic number.

It is an amenable number.

1996423705 is a deficient number, since it is larger than the sum of its proper divisors (399284747).

1996423705 is an equidigital number, since it uses as much as digits as its factorization.

1996423705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399284746.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 1996423705 is about 44681.3574659499. The cubic root of 1996423705 is about 1259.1696269399.

The spelling of 1996423705 in words is "one billion, nine hundred ninety-six million, four hundred twenty-three thousand, seven hundred five".