891379 has 2 divisors, whose sum is σ = 891380. Its totient is φ = 891378.

The previous prime is 891377. The next prime is 891389. The reversal of 891379 is 973198.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 891379 - 2¹ = 891377 is a prime.

Together with 891377, it forms a pair of twin primes.

891379 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (891377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445689 + 445690.

It is an arithmetic number, because the mean of its divisors is an integer number (445690).

2⁸⁹¹³⁷⁹ is an apocalyptic number.

891379 is a deficient number, since it is larger than the sum of its proper divisors (1).

891379 is an equidigital number, since it uses as much as digits as its factorization.

891379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 891379 is about 944.1286988541. The cubic root of 891379 is about 96.2396716865.

The spelling of 891379 in words is "eight hundred ninety-one thousand, three hundred seventy-nine".