39981026329 has 2 divisors, whose sum is σ = 39981026330. Its totient is φ = 39981026328.

The previous prime is 39981026237. The next prime is 39981026341. The reversal of 39981026329 is 92362018993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21013401600 + 18967624729 = 144960^2 + 137723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39981026329 is a prime.

It is not a weakly prime, because it can be changed into another prime (39981026429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19990513164 + 19990513165.

It is an arithmetic number, because the mean of its divisors is an integer number (19990513165).

Almost surely, 2^39981026329 is an apocalyptic number.

It is an amenable number.

39981026329 is a deficient number, since it is larger than the sum of its proper divisors (1).

39981026329 is an equidigital number, since it uses as much as digits as its factorization.

39981026329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 39981026329 in words is "thirty-nine billion, nine hundred eighty-one million, twenty-six thousand, three hundred twenty-nine".