238872013 has 2 divisors, whose sum is σ = 238872014. Its totient is φ = 238872012.

The previous prime is 238871989. The next prime is 238872017. The reversal of 238872013 is 310278832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235837449 + 3034564 = 15357^2 + 1742^2 .

It is a cyclic number.

It is not a de Polignac number, because 238872013 - 2¹⁷ = 238740941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238872013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238872017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119436006 + 119436007.

It is an arithmetic number, because the mean of its divisors is an integer number (119436007).

Almost surely, 2^238872013 is an apocalyptic number.

It is an amenable number.

238872013 is a deficient number, since it is larger than the sum of its proper divisors (1).

238872013 is an equidigital number, since it uses as much as digits as its factorization.

238872013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 238872013 is about 15455.4848840145. The cubic root of 238872013 is about 620.4713836269.

The spelling of 238872013 in words is "two hundred thirty-eight million, eight hundred seventy-two thousand, thirteen".