39242813 has 2 divisors, whose sum is σ = 39242814. Its totient is φ = 39242812.

The previous prime is 39242803. The next prime is 39242831. The reversal of 39242813 is 31824293.

It is a happy number.

Together with next prime (39242831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32467204 + 6775609 = 5698^2 + 2603^2 .

It is a cyclic number.

It is not a de Polignac number, because 39242813 - 2⁸ = 39242557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39242813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39242803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19621406 + 19621407.

It is an arithmetic number, because the mean of its divisors is an integer number (19621407).

Almost surely, 2^39242813 is an apocalyptic number.

It is an amenable number.

39242813 is a deficient number, since it is larger than the sum of its proper divisors (1).

39242813 is an equidigital number, since it uses as much as digits as its factorization.

39242813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 39242813 is about 6264.4084317675. The cubic root of 39242813 is about 339.8234752633.

The spelling of 39242813 in words is "thirty-nine million, two hundred forty-two thousand, eight hundred thirteen".