239181013 has 2 divisors, whose sum is σ = 239181014. Its totient is φ = 239181012.

The previous prime is 239181011. The next prime is 239181023. The reversal of 239181013 is 310181932.

239181013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196644529 + 42536484 = 14023^2 + 6522^2 .

It is a cyclic number.

It is not a de Polignac number, because 239181013 - 2¹ = 239181011 is a prime.

Together with 239181011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239181011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119590506 + 119590507.

It is an arithmetic number, because the mean of its divisors is an integer number (119590507).

Almost surely, 2^239181013 is an apocalyptic number.

It is an amenable number.

239181013 is a deficient number, since it is larger than the sum of its proper divisors (1).

239181013 is an equidigital number, since it uses as much as digits as its factorization.

239181013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 239181013 is about 15465.4781044751. The cubic root of 239181013 is about 620.7388114204.

The spelling of 239181013 in words is "two hundred thirty-nine million, one hundred eighty-one thousand, thirteen".