2143979 has 6 divisors (see below), whose sum is σ = 2263140. Its totient is φ = 2030796.

The previous prime is 2143969. The next prime is 2143993. The reversal of 2143979 is 9793412.

It is not a de Polignac number, because 2143979 - 2⁴ = 2143963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2609 + ... + 3330.

It is an arithmetic number, because the mean of its divisors is an integer number (377190).

2^2143979 is an apocalyptic number.

2143979 is a deficient number, since it is larger than the sum of its proper divisors (119161).

2143979 is an equidigital number, since it uses as much as digits as its factorization.

2143979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5977 (or 5958 counting only the distinct ones).

The product of its digits is 13608, while the sum is 35.

The square root of 2143979 is about 1464.2332464468. The cubic root of 2143979 is about 128.9456935445.

The spelling of 2143979 in words is "two million, one hundred forty-three thousand, nine hundred seventy-nine".