891082201 has 3 divisors (see below), whose sum is σ = 891112053. Its totient is φ = 891052350.

The previous prime is 891082193. The next prime is 891082207. The reversal of 891082201 is 102280198.

It is a happy number.

The square root of 891082201 is 29851.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 891082201 - 2³ = 891082193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891082207) 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 2 ways as a sum of consecutive naturals, for example, 14926 + ... + 44776.

It is an arithmetic number, because the mean of its divisors is an integer number (297037351).

Almost surely, 2^891082201 is an apocalyptic number.

891082201 is the 29851-st square number.

891082201 is the 14926-th centered octagonal number.

It is an amenable number.

891082201 is a deficient number, since it is larger than the sum of its proper divisors (29852).

891082201 is an frugal number, since it uses more digits than its factorization.

891082201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59702 (or 29851 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The cubic root of 891082201 is about 962.2898898429.

Multiplying 891082201 by its product of nonzero digits (2304), we get a square (2053053391104 = 1432848²).

The spelling of 891082201 in words is "eight hundred ninety-one million, eighty-two thousand, two hundred one".