1996636139 has 4 divisors (see below), whose sum is σ = 1996830360. Its totient is φ = 1996441920.

The previous prime is 1996636133. The next prime is 1996636153. The reversal of 1996636139 is 9316366991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9316366991 = 197 ⋅47291203.

It is a cyclic number.

It is not a de Polignac number, because 1996636139 - 2⁴ = 1996636123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1996636133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80774 + ... + 102555.

It is an arithmetic number, because the mean of its divisors is an integer number (499207590).

Almost surely, 2^1996636139 is an apocalyptic number.

1996636139 is a deficient number, since it is larger than the sum of its proper divisors (194221).

1996636139 is a wasteful number, since it uses less digits than its factorization.

1996636139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194220.

The product of its digits is 1417176, while the sum is 53.

The square root of 1996636139 is about 44683.7346133915. The cubic root of 1996636139 is about 1259.2142869575.

The spelling of 1996636139 in words is "one billion, nine hundred ninety-six million, six hundred thirty-six thousand, one hundred thirty-nine".