1996446991 has 8 divisors (see below), whose sum is σ = 2489076864. Its totient is φ = 1555672920.

The previous prime is 1996446967. The next prime is 1996447007.

1996446991 is nontrivially palindromic in base 10.

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 1996446991 - 2⁷ = 1996446863 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 (1996446911) 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, 12963865 + ... + 12964018.

It is an arithmetic number, because the mean of its divisors is an integer number (311134608).

Almost surely, 2^1996446991 is an apocalyptic number.

1996446991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1996446991 is a deficient number, since it is larger than the sum of its proper divisors (492629873).

1996446991 is a wasteful number, since it uses less digits than its factorization.

1996446991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25927901.

The product of its digits is 3779136, while the sum is 58.

The square root of 1996446991 is about 44681.6180436653. The cubic root of 1996446991 is about 1259.1745225122.

The spelling of 1996446991 in words is "one billion, nine hundred ninety-six million, four hundred forty-six thousand, nine hundred ninety-one".