2179679 has 2 divisors, whose sum is σ = 2179680. Its totient is φ = 2179678.

The previous prime is 2179651. The next prime is 2179693. The reversal of 2179679 is 9769712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2179679 - 2²⁰ = 1131103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2179609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089839 + 1089840.

It is an arithmetic number, because the mean of its divisors is an integer number (1089840).

2^2179679 is an apocalyptic number.

2179679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2179679 is an equidigital number, since it uses as much as digits as its factorization.

2179679 is an evil number, because the sum of its binary digits is even.

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

The square root of 2179679 is about 1476.3735977049. The cubic root of 2179679 is about 129.6574611514.

The spelling of 2179679 in words is "two million, one hundred seventy-nine thousand, six hundred seventy-nine".