1996369639 has 4 divisors (see below), whose sum is σ = 2177857800. Its totient is φ = 1814881480.

The previous prime is 1996369601. The next prime is 1996369673. The reversal of 1996369639 is 9369636991.

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

It is a cyclic number.

It is not a de Polignac number, because 1996369639 - 2¹³ = 1996361447 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 (1996369679) 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, 90744064 + ... + 90744085.

It is an arithmetic number, because the mean of its divisors is an integer number (544464450).

Almost surely, 2^1996369639 is an apocalyptic number.

1996369639 is a deficient number, since it is larger than the sum of its proper divisors (181488161).

1996369639 is a wasteful number, since it uses less digits than its factorization.

1996369639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181488160.

The product of its digits is 12754584, while the sum is 61.

The square root of 1996369639 is about 44680.7524444251. The cubic root of 1996369639 is about 1259.1582601344.

The spelling of 1996369639 in words is "one billion, nine hundred ninety-six million, three hundred sixty-nine thousand, six hundred thirty-nine".