891049 has 2 divisors, whose sum is σ = 891050. Its totient is φ = 891048.

The previous prime is 891047. The next prime is 891061. The reversal of 891049 is 940198.

891049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 837225 + 53824 = 915^2 + 232^2 .

It is a cyclic number.

It is not a de Polignac number, because 891049 - 2¹ = 891047 is a prime.

Together with 891047, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 891049.

It is not a weakly prime, because it can be changed into another prime (891047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445524 + 445525.

It is an arithmetic number, because the mean of its divisors is an integer number (445525).

2⁸⁹¹⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

891049 is a deficient number, since it is larger than the sum of its proper divisors (1).

891049 is an equidigital number, since it uses as much as digits as its factorization.

891049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 891049 is about 943.9539183668. The cubic root of 891049 is about 96.2277938314.

The spelling of 891049 in words is "eight hundred ninety-one thousand, forty-nine".