39139445 has 16 divisors (see below), whose sum is σ = 49272192. Its totient is φ = 29789760.

The previous prime is 39139409. The next prime is 39139447. The reversal of 39139445 is 54493193.

39139445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39139445 - 2⁶ = 39139381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39139399 and 39139408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39139447) 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 15 ways as a sum of consecutive naturals, for example, 23459 + ... + 25071.

It is an arithmetic number, because the mean of its divisors is an integer number (3079512).

Almost surely, 2^39139445 is an apocalyptic number.

It is an amenable number.

39139445 is a deficient number, since it is larger than the sum of its proper divisors (10132747).

39139445 is a wasteful number, since it uses less digits than its factorization.

39139445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852.

The product of its digits is 58320, while the sum is 38.

The square root of 39139445 is about 6256.1525716689. The cubic root of 39139445 is about 339.5248408753.

The spelling of 39139445 in words is "thirty-nine million, one hundred thirty-nine thousand, four hundred forty-five".