1996391839 has 8 divisors (see below), whose sum is σ = 2157956640. Its totient is φ = 1835969376.

The previous prime is 1996391797. The next prime is 1996391851. The reversal of 1996391839 is 9381936991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1996391839 - 2²⁹ = 1459520927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996391879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281947 + ... + 288940.

It is an arithmetic number, because the mean of its divisors is an integer number (269744580).

Almost surely, 2^1996391839 is an apocalyptic number.

1996391839 is a deficient number, since it is larger than the sum of its proper divisors (161564801).

1996391839 is a wasteful number, since it uses less digits than its factorization.

1996391839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571169.

The product of its digits is 2834352, while the sum is 58.

The square root of 1996391839 is about 44681.0008728542. Note that the first 3 decimals coincide. The cubic root of 1996391839 is about 1259.1629274748.

The spelling of 1996391839 in words is "one billion, nine hundred ninety-six million, three hundred ninety-one thousand, eight hundred thirty-nine".