879940204009 has 2 divisors, whose sum is σ = 879940204010. Its totient is φ = 879940204008.

The previous prime is 879940203959. The next prime is 879940204019. The reversal of 879940204009 is 900402049978.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 682271044009 + 197669160000 = 825997^2 + 444600^2 .

It is a cyclic number.

It is not a de Polignac number, because 879940204009 - 2⁷ = 879940203881 is a prime.

It is not a weakly prime, because it can be changed into another prime (879940204019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439970102004 + 439970102005.

It is an arithmetic number, because the mean of its divisors is an integer number (439970102005).

Almost surely, 2^879940204009 is an apocalyptic number.

It is an amenable number.

879940204009 is a deficient number, since it is larger than the sum of its proper divisors (1).

879940204009 is an equidigital number, since it uses as much as digits as its factorization.

879940204009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 879940204009 in words is "eight hundred seventy-nine billion, nine hundred forty million, two hundred four thousand, nine".