39934441639 has 2 divisors, whose sum is σ = 39934441640. Its totient is φ = 39934441638.

The previous prime is 39934441609. The next prime is 39934441691. The reversal of 39934441639 is 93614443993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39934441639 - 2⁷ = 39934441511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39934441639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39934441609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19967220819 + 19967220820.

It is an arithmetic number, because the mean of its divisors is an integer number (19967220820).

Almost surely, 2^39934441639 is an apocalyptic number.

39934441639 is a deficient number, since it is larger than the sum of its proper divisors (1).

39934441639 is an equidigital number, since it uses as much as digits as its factorization.

39934441639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7558272, while the sum is 55.

The spelling of 39934441639 in words is "thirty-nine billion, nine hundred thirty-four million, four hundred forty-one thousand, six hundred thirty-nine".