39919449 has 4 divisors (see below), whose sum is σ = 53225936. Its totient is φ = 26612964.

The previous prime is 39919447. The next prime is 39919463. The reversal of 39919449 is 94491993.

39919449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is not a de Polignac number, because 39919449 - 2¹ = 39919447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39919398 and 39919407.

It is not an unprimeable number, because it can be changed into a prime (39919447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6653239 + ... + 6653244.

It is an arithmetic number, because the mean of its divisors is an integer number (13306484).

Almost surely, 2^39919449 is an apocalyptic number.

It is an amenable number.

39919449 is a deficient number, since it is larger than the sum of its proper divisors (13306487).

39919449 is a wasteful number, since it uses less digits than its factorization.

39919449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13306486.

The product of its digits is 314928, while the sum is 48.

The square root of 39919449 is about 6318.1839954215. The cubic root of 39919449 is about 341.7654679431.

The spelling of 39919449 in words is "thirty-nine million, nine hundred nineteen thousand, four hundred forty-nine".