239400013 has 2 divisors, whose sum is σ = 239400014. Its totient is φ = 239400012.

The previous prime is 239399989. The next prime is 239400023. The reversal of 239400013 is 310004932.

239400013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236021769 + 3378244 = 15363^2 + 1838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239400013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239400023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119700006 + 119700007.

It is an arithmetic number, because the mean of its divisors is an integer number (119700007).

Almost surely, 2^239400013 is an apocalyptic number.

It is an amenable number.

239400013 is a deficient number, since it is larger than the sum of its proper divisors (1).

239400013 is an equidigital number, since it uses as much as digits as its factorization.

239400013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 239400013 is about 15472.5567699718. The cubic root of 239400013 is about 620.9282081853.

Adding to 239400013 its reverse (310004932), we get a palindrome (549404945).

The spelling of 239400013 in words is "two hundred thirty-nine million, four hundred thousand, thirteen".