39685769 has 6 divisors (see below), whose sum is σ = 42157854. Its totient is φ = 37351040.

The previous prime is 39685759. The next prime is 39685771. The reversal of 39685769 is 96758693.

39685769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 24631369 + 15054400 = 4963^2 + 3880^2 .

It is not a de Polignac number, because 39685769 - 2⁴ = 39685753 is a prime.

It is a super-2 number, since 2×39685769² = 3149920522242722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39685769.

It is not an unprimeable number, because it can be changed into a prime (39685759) 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, 68372 + ... + 68949.

It is an arithmetic number, because the mean of its divisors is an integer number (7026309).

Almost surely, 2^39685769 is an apocalyptic number.

It is an amenable number.

39685769 is a deficient number, since it is larger than the sum of its proper divisors (2472085).

39685769 is a wasteful number, since it uses less digits than its factorization.

39685769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137355 (or 137338 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 53.

The square root of 39685769 is about 6299.6641973997. The cubic root of 39685769 is about 341.0972882253.

The spelling of 39685769 in words is "thirty-nine million, six hundred eighty-five thousand, seven hundred sixty-nine".