39131361 has 6 divisors (see below), whose sum is σ = 56523090. Its totient is φ = 26087568.

The previous prime is 39131357. The next prime is 39131387. The reversal of 39131361 is 16313193.

It can be written as a sum of positive squares in only one way, i.e., 38192400 + 938961 = 6180^2 + 969^2 .

It is not a de Polignac number, because 39131361 - 2² = 39131357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39131321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2173956 + ... + 2173973.

It is an arithmetic number, because the mean of its divisors is an integer number (9420515).

Almost surely, 2^39131361 is an apocalyptic number.

It is an amenable number.

39131361 is a deficient number, since it is larger than the sum of its proper divisors (17391729).

39131361 is a wasteful number, since it uses less digits than its factorization.

39131361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347935 (or 4347932 counting only the distinct ones).

The product of its digits is 1458, while the sum is 27.

The square root of 39131361 is about 6255.5064543169. The cubic root of 39131361 is about 339.5014637102.

The spelling of 39131361 in words is "thirty-nine million, one hundred thirty-one thousand, three hundred sixty-one".