39981876247 has 2 divisors, whose sum is σ = 39981876248. Its totient is φ = 39981876246.

The previous prime is 39981876239. The next prime is 39981876313. The reversal of 39981876247 is 74267818993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39981876247 - 2³ = 39981876239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39981976247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19990938123 + 19990938124.

It is an arithmetic number, because the mean of its divisors is an integer number (19990938124).

Almost surely, 2^39981876247 is an apocalyptic number.

39981876247 is a deficient number, since it is larger than the sum of its proper divisors (1).

39981876247 is an equidigital number, since it uses as much as digits as its factorization.

39981876247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 64.

The spelling of 39981876247 in words is "thirty-nine billion, nine hundred eighty-one million, eight hundred seventy-six thousand, two hundred forty-seven".