39960969313 has 2 divisors, whose sum is σ = 39960969314. Its totient is φ = 39960969312.

The previous prime is 39960969211. The next prime is 39960969317. The reversal of 39960969313 is 31396906993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39556436544 + 404532769 = 198888^2 + 20113^2 .

It is an emirp because it is prime and its reverse (31396906993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39960969313 - 2¹³ = 39960961121 is a prime.

It is not a weakly prime, because it can be changed into another prime (39960969317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19980484656 + 19980484657.

It is an arithmetic number, because the mean of its divisors is an integer number (19980484657).

Almost surely, 2^39960969313 is an apocalyptic number.

It is an amenable number.

39960969313 is a deficient number, since it is larger than the sum of its proper divisors (1).

39960969313 is an equidigital number, since it uses as much as digits as its factorization.

39960969313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6377292, while the sum is 58.

The spelling of 39960969313 in words is "thirty-nine billion, nine hundred sixty million, nine hundred sixty-nine thousand, three hundred thirteen".