39331213 has 2 divisors, whose sum is σ = 39331214. Its totient is φ = 39331212.

The previous prime is 39331181. The next prime is 39331223. The reversal of 39331213 is 31213393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30492484 + 8838729 = 5522^2 + 2973^2 .

It is an emirp because it is prime and its reverse (31213393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39331213 - 2⁵ = 39331181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39331223) 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 as a sum of consecutive naturals, namely, 19665606 + 19665607.

It is an arithmetic number, because the mean of its divisors is an integer number (19665607).

Almost surely, 2^39331213 is an apocalyptic number.

It is an amenable number.

39331213 is a deficient number, since it is larger than the sum of its proper divisors (1).

39331213 is an equidigital number, since it uses as much as digits as its factorization.

39331213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 25.

The square root of 39331213 is about 6271.4601967963. The cubic root of 39331213 is about 340.0784507552.

The spelling of 39331213 in words is "thirty-nine million, three hundred thirty-one thousand, two hundred thirteen".