3940715399 has 2 divisors, whose sum is σ = 3940715400. Its totient is φ = 3940715398.

The previous prime is 3940715393. The next prime is 3940715453. The reversal of 3940715399 is 9935170493.

It is a weak prime.

It is an emirp because it is prime and its reverse (9935170493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3940715399 - 2²⁰ = 3939666823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3940715393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970357699 + 1970357700.

It is an arithmetic number, because the mean of its divisors is an integer number (1970357700).

Almost surely, 2^3940715399 is an apocalyptic number.

3940715399 is a deficient number, since it is larger than the sum of its proper divisors (1).

3940715399 is an equidigital number, since it uses as much as digits as its factorization.

3940715399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 918540, while the sum is 50.

The square root of 3940715399 is about 62775.1176741231. The cubic root of 3940715399 is about 1579.5196156152.

The spelling of 3940715399 in words is "three billion, nine hundred forty million, seven hundred fifteen thousand, three hundred ninety-nine".