1578979 has 2 divisors, whose sum is σ = 1578980. Its totient is φ = 1578978.

The previous prime is 1578961. The next prime is 1579001. The reversal of 1578979 is 9798751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1578979 - 2⁷ = 1578851 is a prime.

1578979 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1578779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 789489 + 789490.

It is an arithmetic number, because the mean of its divisors is an integer number (789490).

2^1578979 is an apocalyptic number.

1578979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1578979 is an equidigital number, since it uses as much as digits as its factorization.

1578979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 46.

The square root of 1578979 is about 1256.5743113720. The cubic root of 1578979 is about 116.4462350228.

The spelling of 1578979 in words is "one million, five hundred seventy-eight thousand, nine hundred seventy-nine".