2129579 has 2 divisors, whose sum is σ = 2129580. Its totient is φ = 2129578.

The previous prime is 2129551. The next prime is 2129587. The reversal of 2129579 is 9759212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2129579 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2129509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064789 + 1064790.

It is an arithmetic number, because the mean of its divisors is an integer number (1064790).

2^2129579 is an apocalyptic number.

2129579 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129579 is an equidigital number, since it uses as much as digits as its factorization.

2129579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 35.

The square root of 2129579 is about 1459.3077125816. The cubic root of 2129579 is about 128.6563575848.

The spelling of 2129579 in words is "two million, one hundred twenty-nine thousand, five hundred seventy-nine".