39039696989 has 2 divisors, whose sum is σ = 39039696990. Its totient is φ = 39039696988.

The previous prime is 39039696923. The next prime is 39039697001. The reversal of 39039696989 is 98969693093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31288303225 + 7751393764 = 176885^2 + 88042^2 .

It is an emirp because it is prime and its reverse (98969693093) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39039696989 is a prime.

It is a super-2 number, since 2×39039696989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39030696989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19519848494 + 19519848495.

It is an arithmetic number, because the mean of its divisors is an integer number (19519848495).

Almost surely, 2^39039696989 is an apocalyptic number.

It is an amenable number.

39039696989 is a deficient number, since it is larger than the sum of its proper divisors (1).

39039696989 is an equidigital number, since it uses as much as digits as its factorization.

39039696989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153055008, while the sum is 71.

The spelling of 39039696989 in words is "thirty-nine billion, thirty-nine million, six hundred ninety-six thousand, nine hundred eighty-nine".