39965139 has 6 divisors (see below), whose sum is σ = 57727436. Its totient is φ = 26643420.

The previous prime is 39965137. The next prime is 39965173. The reversal of 39965139 is 93156993.

39965139 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 39965139 - 2¹ = 39965137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39965094 and 39965103.

It is not an unprimeable number, because it can be changed into a prime (39965137) 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 5 ways as a sum of consecutive naturals, for example, 2220277 + ... + 2220294.

Almost surely, 2^39965139 is an apocalyptic number.

39965139 is a deficient number, since it is larger than the sum of its proper divisors (17762297).

39965139 is a wasteful number, since it uses less digits than its factorization.

39965139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440577 (or 4440574 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 39965139 is about 6321.7987155556. The cubic root of 39965139 is about 341.8958080062.

It can be divided in two parts, 39965 and 139, that added together give a palindrome (40104).

The spelling of 39965139 in words is "thirty-nine million, nine hundred sixty-five thousand, one hundred thirty-nine".