39936005449 has 4 divisors (see below), whose sum is σ = 41672353536. Its totient is φ = 38199657364.

The previous prime is 39936005443. The next prime is 39936005453. The reversal of 39936005449 is 94450063993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94450063993 = 15187 ⋅6219139.

It is not a de Polignac number, because 39936005449 - 2¹⁹ = 39935481161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39936005396 and 39936005405.

It is not an unprimeable number, because it can be changed into a prime (39936005443) 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 in 3 ways as a sum of consecutive naturals, for example, 868174009 + ... + 868174054.

It is an arithmetic number, because the mean of its divisors is an integer number (10418088384).

Almost surely, 2^39936005449 is an apocalyptic number.

It is an amenable number.

39936005449 is a deficient number, since it is larger than the sum of its proper divisors (1736348087).

39936005449 is a wasteful number, since it uses less digits than its factorization.

39936005449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736348086.

The product of its (nonzero) digits is 3149280, while the sum is 52.

The spelling of 39936005449 in words is "thirty-nine billion, nine hundred thirty-six million, five thousand, four hundred forty-nine".