393916541439 has 4 divisors (see below), whose sum is σ = 525222055256. Its totient is φ = 262611027624.

The previous prime is 393916541413. The next prime is 393916541453. The reversal of 393916541439 is 934145619393.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 393916541439 - 2⁷ = 393916541311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393916540439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65652756904 + ... + 65652756909.

It is an arithmetic number, because the mean of its divisors is an integer number (131305513814).

Almost surely, 2^393916541439 is an apocalyptic number.

393916541439 is a deficient number, since it is larger than the sum of its proper divisors (131305513817).

393916541439 is a wasteful number, since it uses less digits than its factorization.

393916541439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131305513816.

The product of its digits is 9447840, while the sum is 57.

The spelling of 393916541439 in words is "three hundred ninety-three billion, nine hundred sixteen million, five hundred forty-one thousand, four hundred thirty-nine".