2159679 has 4 divisors (see below), whose sum is σ = 2879576. Its totient is φ = 1439784.

The previous prime is 2159671. The next prime is 2159681. The reversal of 2159679 is 9769512.

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

It is not a de Polignac number, because 2159679 - 2³ = 2159671 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159671) 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, 359944 + ... + 359949.

It is an arithmetic number, because the mean of its divisors is an integer number (719894).

2^2159679 is an apocalyptic number.

2159679 is a deficient number, since it is larger than the sum of its proper divisors (719897).

2159679 is an equidigital number, since it uses as much as digits as its factorization.

2159679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719896.

The product of its digits is 34020, while the sum is 39.

The square root of 2159679 is about 1469.5846351946. The cubic root of 2159679 is about 129.2596776260.

The spelling of 2159679 in words is "two million, one hundred fifty-nine thousand, six hundred seventy-nine".