1845979 has 4 divisors (see below), whose sum is σ = 1954584. Its totient is φ = 1737376.

The previous prime is 1845959. The next prime is 1846001. The reversal of 1845979 is 9795481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1845979 - 2¹⁵ = 1813211 is a prime.

It is a Duffinian number.

1845979 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1845919) 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, 54277 + ... + 54310.

It is an arithmetic number, because the mean of its divisors is an integer number (488646).

2^1845979 is an apocalyptic number.

1845979 is a deficient number, since it is larger than the sum of its proper divisors (108605).

1845979 is a wasteful number, since it uses less digits than its factorization.

1845979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108604.

The product of its digits is 90720, while the sum is 43.

The square root of 1845979 is about 1358.6680978076. The cubic root of 1845979 is about 122.6710978564.

The spelling of 1845979 in words is "one million, eight hundred forty-five thousand, nine hundred seventy-nine".