1822979 has 4 divisors (see below), whose sum is σ = 1827000. Its totient is φ = 1818960.

The previous prime is 1822967. The next prime is 1822981. The reversal of 1822979 is 9792281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9792281 = 181 ⋅54101.

It is a cyclic number.

It is not a de Polignac number, because 1822979 - 2⁴ = 1822963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1822939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229 + ... + 2270.

It is an arithmetic number, because the mean of its divisors is an integer number (456750).

2^1822979 is an apocalyptic number.

1822979 is a deficient number, since it is larger than the sum of its proper divisors (4021).

1822979 is an equidigital number, since it uses as much as digits as its factorization.

1822979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020.

The product of its digits is 18144, while the sum is 38.

The square root of 1822979 is about 1350.1773957521. The cubic root of 1822979 is about 122.1594930936.

The spelling of 1822979 in words is "one million, eight hundred twenty-two thousand, nine hundred seventy-nine".