896799991 has 6 divisors (see below), whose sum is σ = 900719960. Its totient is φ = 892897008.

The previous prime is 896799989. The next prime is 896800027. The reversal of 896799991 is 199997698.

It is not a de Polignac number, because 896799991 - 2¹ = 896799989 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 (896799901) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 46030 + ... + 62548.

Almost surely, 2^896799991 is an apocalyptic number.

896799991 is a deficient number, since it is larger than the sum of its proper divisors (3919969).

896799991 is an equidigital number, since it uses as much as digits as its factorization.

896799991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16985 (or 16752 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 67.

The square root of 896799991 is about 29946.6190245243. The cubic root of 896799991 is about 964.3437387912.

The spelling of 896799991 in words is "eight hundred ninety-six million, seven hundred ninety-nine thousand, nine hundred ninety-one".