39976642879 has 2 divisors, whose sum is σ = 39976642880. Its totient is φ = 39976642878.

The previous prime is 39976642877. The next prime is 39976642891. The reversal of 39976642879 is 97824667993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39976642879 - 2¹ = 39976642877 is a prime.

Together with 39976642877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39976642877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19988321439 + 19988321440.

It is an arithmetic number, because the mean of its divisors is an integer number (19988321440).

Almost surely, 2^39976642879 is an apocalyptic number.

39976642879 is a deficient number, since it is larger than the sum of its proper divisors (1).

39976642879 is an equidigital number, since it uses as much as digits as its factorization.

39976642879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246903552, while the sum is 70.

The spelling of 39976642879 in words is "thirty-nine billion, nine hundred seventy-six million, six hundred forty-two thousand, eight hundred seventy-nine".