39728937887 has 2 divisors, whose sum is σ = 39728937888. Its totient is φ = 39728937886.

The previous prime is 39728937823. The next prime is 39728937893. The reversal of 39728937887 is 78873982793.

39728937887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (78873982793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39728937887 - 2⁶ = 39728937823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39728937887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39728907887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19864468943 + 19864468944.

It is an arithmetic number, because the mean of its divisors is an integer number (19864468944).

Almost surely, 2^39728937887 is an apocalyptic number.

39728937887 is a deficient number, since it is larger than the sum of its proper divisors (1).

39728937887 is an equidigital number, since it uses as much as digits as its factorization.

39728937887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256048128, while the sum is 71.

The spelling of 39728937887 in words is "thirty-nine billion, seven hundred twenty-eight million, nine hundred thirty-seven thousand, eight hundred eighty-seven".