891964996 has 36 divisors (see below), whose sum is σ = 1721198892. Its totient is φ = 402058944.

The previous prime is 891964979. The next prime is 891965023. The reversal of 891964996 is 699469198.

It can be written as a sum of positive squares in 2 ways, for example, as 426009600 + 465955396 = 20640^2 + 21586^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91510 + ... + 100786.

Almost surely, 2^891964996 is an apocalyptic number.

891964996 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

891964996 is a deficient number, since it is larger than the sum of its proper divisors (829233896).

891964996 is a wasteful number, since it uses less digits than its factorization.

891964996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9380 (or 9335 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 61.

The square root of 891964996 is about 29865.7830300831. The cubic root of 891964996 is about 962.6075651079.

The spelling of 891964996 in words is "eight hundred ninety-one million, nine hundred sixty-four thousand, nine hundred ninety-six".