39723364819 has 2 divisors, whose sum is σ = 39723364820. Its totient is φ = 39723364818.

The previous prime is 39723364787. The next prime is 39723364841. The reversal of 39723364819 is 91846332793.

It is a strong prime.

It is an emirp because it is prime and its reverse (91846332793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39723364819 - 2⁵ = 39723364787 is a prime.

It is a super-2 number, since 2×39723364819² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39723364819.

It is not a weakly prime, because it can be changed into another prime (39723364019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19861682409 + 19861682410.

It is an arithmetic number, because the mean of its divisors is an integer number (19861682410).

Almost surely, 2^39723364819 is an apocalyptic number.

39723364819 is a deficient number, since it is larger than the sum of its proper divisors (1).

39723364819 is an equidigital number, since it uses as much as digits as its factorization.

39723364819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 55.

The spelling of 39723364819 in words is "thirty-nine billion, seven hundred twenty-three million, three hundred sixty-four thousand, eight hundred nineteen".