39131213 has 8 divisors (see below), whose sum is σ = 43597440. Its totient is φ = 34816480.

The previous prime is 39131189. The next prime is 39131249. The reversal of 39131213 is 31213193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39131213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39131293) 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 7 ways as a sum of consecutive naturals, for example, 37328 + ... + 38361.

It is an arithmetic number, because the mean of its divisors is an integer number (5449680).

Almost surely, 2^39131213 is an apocalyptic number.

It is an amenable number.

39131213 is a deficient number, since it is larger than the sum of its proper divisors (4466227).

39131213 is a wasteful number, since it uses less digits than its factorization.

39131213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75747.

The product of its digits is 486, while the sum is 23.

The square root of 39131213 is about 6255.4946247279. The cubic root of 39131213 is about 339.5010356965.

The spelling of 39131213 in words is "thirty-nine million, one hundred thirty-one thousand, two hundred thirteen".