39846979 has 2 divisors, whose sum is σ = 39846980. Its totient is φ = 39846978.

The previous prime is 39846967. The next prime is 39847001. The reversal of 39846979 is 97964893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39846979 - 2⁹ = 39846467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39846959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19923489 + 19923490.

It is an arithmetic number, because the mean of its divisors is an integer number (19923490).

Almost surely, 2^39846979 is an apocalyptic number.

39846979 is a deficient number, since it is larger than the sum of its proper divisors (1).

39846979 is an equidigital number, since it uses as much as digits as its factorization.

39846979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 55.

The square root of 39846979 is about 6312.4463562077. The cubic root of 39846979 is about 341.5585283263.

The spelling of 39846979 in words is "thirty-nine million, eight hundred forty-six thousand, nine hundred seventy-nine".