10321891 has 4 divisors (see below), whose sum is σ = 10362312. Its totient is φ = 10281472.

The previous prime is 10321889. The next prime is 10321901. The reversal of 10321891 is 19812301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10321891 - 2¹ = 10321889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10321841) 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 3 ways as a sum of consecutive naturals, for example, 19825 + ... + 20338.

It is an arithmetic number, because the mean of its divisors is an integer number (2590578).

Almost surely, 2^10321891 is an apocalyptic number.

10321891 is a deficient number, since it is larger than the sum of its proper divisors (40421).

10321891 is an equidigital number, since it uses as much as digits as its factorization.

10321891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40420.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 10321891 is about 3212.7699886547. The cubic root of 10321891 is about 217.7307438013.

The spelling of 10321891 in words is "ten million, three hundred twenty-one thousand, eight hundred ninety-one".