921379 has 2 divisors, whose sum is σ = 921380. Its totient is φ = 921378.

The previous prime is 921373. The next prime is 921407. The reversal of 921379 is 973129.

921379 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 is an emirp because it is prime and its reverse (973129) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921379 is a prime.

921379 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 921379.

It is not a weakly prime, because it can be changed into another prime (921373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460689 + 460690.

It is an arithmetic number, because the mean of its divisors is an integer number (460690).

2⁹²¹³⁷⁹ is an apocalyptic number.

921379 is a deficient number, since it is larger than the sum of its proper divisors (1).

921379 is an equidigital number, since it uses as much as digits as its factorization.

921379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 31.

The square root of 921379 is about 959.8848889320. The cubic root of 921379 is about 97.3074525652.

The spelling of 921379 in words is "nine hundred twenty-one thousand, three hundred seventy-nine".