39928879 has 2 divisors, whose sum is σ = 39928880. Its totient is φ = 39928878.

The previous prime is 39928873. The next prime is 39928901. The reversal of 39928879 is 97882993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39928879 - 2¹³ = 39920687 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39928873) 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, 19964439 + 19964440.

It is an arithmetic number, because the mean of its divisors is an integer number (19964440).

Almost surely, 2^39928879 is an apocalyptic number.

39928879 is a deficient number, since it is larger than the sum of its proper divisors (1).

39928879 is an equidigital number, since it uses as much as digits as its factorization.

39928879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 39928879 is about 6318.9302100909. The cubic root of 39928879 is about 341.7923770872.

The spelling of 39928879 in words is "thirty-nine million, nine hundred twenty-eight thousand, eight hundred seventy-nine".