39904734293 has 2 divisors, whose sum is σ = 39904734294. Its totient is φ = 39904734292.

The previous prime is 39904734277. The next prime is 39904734299. The reversal of 39904734293 is 39243740993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30414662404 + 9490071889 = 174398^2 + 97417^2 .

It is an emirp because it is prime and its reverse (39243740993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39904734293 - 2⁴ = 39904734277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39904734299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19952367146 + 19952367147.

It is an arithmetic number, because the mean of its divisors is an integer number (19952367147).

Almost surely, 2^39904734293 is an apocalyptic number.

It is an amenable number.

39904734293 is a deficient number, since it is larger than the sum of its proper divisors (1).

39904734293 is an equidigital number, since it uses as much as digits as its factorization.

39904734293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4408992, while the sum is 53.

The spelling of 39904734293 in words is "thirty-nine billion, nine hundred four million, seven hundred thirty-four thousand, two hundred ninety-three".