2167979 has 4 divisors (see below), whose sum is σ = 2365080. Its totient is φ = 1970880.

The previous prime is 2167973. The next prime is 2167987. The reversal of 2167979 is 9797612.

It is a happy number.

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 2167979 - 2⁸ = 2167723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2167973) 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, 98534 + ... + 98555.

It is an arithmetic number, because the mean of its divisors is an integer number (591270).

2^2167979 is an apocalyptic number.

2167979 is a deficient number, since it is larger than the sum of its proper divisors (197101).

2167979 is a wasteful number, since it uses less digits than its factorization.

2167979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197100.

The product of its digits is 47628, while the sum is 41.

The square root of 2167979 is about 1472.4058543758. The cubic root of 2167979 is about 129.4250546512.

The spelling of 2167979 in words is "two million, one hundred sixty-seven thousand, nine hundred seventy-nine".