2089979 has 2 divisors, whose sum is σ = 2089980. Its totient is φ = 2089978.

The previous prime is 2089951. The next prime is 2090003. The reversal of 2089979 is 9799802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2089979 is a prime.

It is not a weakly prime, because it can be changed into another prime (2089939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1044989 + 1044990.

It is an arithmetic number, because the mean of its divisors is an integer number (1044990).

2^2089979 is an apocalyptic number.

2089979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2089979 is an equidigital number, since it uses as much as digits as its factorization.

2089979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 2089979 is about 1445.6759664600. The cubic root of 2089979 is about 127.8538982414.

The spelling of 2089979 in words is "two million, eighty-nine thousand, nine hundred seventy-nine".