891322013 has 16 divisors (see below), whose sum is σ = 963757056. Its totient is φ = 821905920.

The previous prime is 891322009. The next prime is 891322021. The reversal of 891322013 is 310223198.

It is not a de Polignac number, because 891322013 - 2² = 891322009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891322073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195245 + ... + 199757.

It is an arithmetic number, because the mean of its divisors is an integer number (60234816).

Almost surely, 2^891322013 is an apocalyptic number.

It is an amenable number.

891322013 is a deficient number, since it is larger than the sum of its proper divisors (72435043).

891322013 is a wasteful number, since it uses less digits than its factorization.

891322013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4844.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 891322013 is about 29855.0165466375. The cubic root of 891322013 is about 962.3762073432.

The spelling of 891322013 in words is "eight hundred ninety-one million, three hundred twenty-two thousand, thirteen".