39916278979 has 2 divisors, whose sum is σ = 39916278980. Its totient is φ = 39916278978.

The previous prime is 39916278973. The next prime is 39916279003. The reversal of 39916278979 is 97987261993.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39916278979 - 2¹⁷ = 39916147907 is a prime.

It is not a weakly prime, because it can be changed into another prime (39916278973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19958139489 + 19958139490.

It is an arithmetic number, because the mean of its divisors is an integer number (19958139490).

Almost surely, 2^39916278979 is an apocalyptic number.

39916278979 is a deficient number, since it is larger than the sum of its proper divisors (1).

39916278979 is an equidigital number, since it uses as much as digits as its factorization.

39916278979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92588832, while the sum is 70.

The spelling of 39916278979 in words is "thirty-nine billion, nine hundred sixteen million, two hundred seventy-eight thousand, nine hundred seventy-nine".