2179849 has 4 divisors (see below), whose sum is σ = 2491264. Its totient is φ = 1868436.

The previous prime is 2179831. The next prime is 2179867. The reversal of 2179849 is 9489712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2179831) and next prime (2179867).

It is a cyclic number.

It is not a de Polignac number, because 2179849 - 2¹³ = 2171657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2179819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155697 + ... + 155710.

It is an arithmetic number, because the mean of its divisors is an integer number (622816).

2^2179849 is an apocalyptic number.

It is an amenable number.

2179849 is a deficient number, since it is larger than the sum of its proper divisors (311415).

2179849 is an equidigital number, since it uses as much as digits as its factorization.

2179849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311414.

The product of its digits is 36288, while the sum is 40.

The square root of 2179849 is about 1476.4311700855. The cubic root of 2179849 is about 129.6608318611.

The spelling of 2179849 in words is "two million, one hundred seventy-nine thousand, eight hundred forty-nine".