10921289 has 4 divisors (see below), whose sum is σ = 10928256. Its totient is φ = 10914324.

The previous prime is 10921283. The next prime is 10921301. The reversal of 10921289 is 98212901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98212901 = 577 ⋅170213.

It is a cyclic number.

It is not a de Polignac number, because 10921289 - 2⁸ = 10921033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10921283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92 + ... + 4674.

It is an arithmetic number, because the mean of its divisors is an integer number (2732064).

Almost surely, 2^10921289 is an apocalyptic number.

It is an amenable number.

10921289 is a deficient number, since it is larger than the sum of its proper divisors (6967).

10921289 is an equidigital number, since it uses as much as digits as its factorization.

10921289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 10921289 is about 3304.7373571889. The cubic root of 10921289 is about 221.8662790727.

The spelling of 10921289 in words is "ten million, nine hundred twenty-one thousand, two hundred eighty-nine".