39729141 has 6 divisors (see below), whose sum is σ = 57386550. Its totient is φ = 26486088.

The previous prime is 39729127. The next prime is 39729169. The reversal of 39729141 is 14192793.

It can be written as a sum of positive squares in only one way, i.e., 37638225 + 2090916 = 6135^2 + 1446^2 .

It is not a de Polignac number, because 39729141 - 2⁷ = 39729013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39729096 and 39729105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39729341) 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 5 ways as a sum of consecutive naturals, for example, 2207166 + ... + 2207183.

It is an arithmetic number, because the mean of its divisors is an integer number (9564425).

Almost surely, 2^39729141 is an apocalyptic number.

It is an amenable number.

39729141 is a deficient number, since it is larger than the sum of its proper divisors (17657409).

39729141 is a wasteful number, since it uses less digits than its factorization.

39729141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414355 (or 4414352 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 39729141 is about 6303.1056630839. The cubic root of 39729141 is about 341.2215030746.

The spelling of 39729141 in words is "thirty-nine million, seven hundred twenty-nine thousand, one hundred forty-one".