1979129 has 2 divisors, whose sum is σ = 1979130. Its totient is φ = 1979128.

The previous prime is 1979119. The next prime is 1979141. The reversal of 1979129 is 9219791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 769129 = 1100^2 + 877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1979129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1979092 and 1979101.

It is not a weakly prime, because it can be changed into another prime (1979119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989564 + 989565.

It is an arithmetic number, because the mean of its divisors is an integer number (989565).

2^1979129 is an apocalyptic number.

It is an amenable number.

1979129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979129 is an equidigital number, since it uses as much as digits as its factorization.

1979129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 38.

The square root of 1979129 is about 1406.8151975295. The cubic root of 1979129 is about 125.5523080523.

The spelling of 1979129 in words is "one million, nine hundred seventy-nine thousand, one hundred twenty-nine".