238920013 has 2 divisors, whose sum is σ = 238920014. Its totient is φ = 238920012.

The previous prime is 238919977. The next prime is 238920049. The reversal of 238920013 is 310029832.

It is a balanced prime because it is at equal distance from previous prime (238919977) and next prime (238920049).

It can be written as a sum of positive squares in only one way, i.e., 155800324 + 83119689 = 12482^2 + 9117^2 .

It is a cyclic number.

It is not a de Polignac number, because 238920013 - 2⁹ = 238919501 is a prime.

It is a super-2 number, since 2×238920013² = 114165545223840338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238929013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119460006 + 119460007.

It is an arithmetic number, because the mean of its divisors is an integer number (119460007).

Almost surely, 2^238920013 is an apocalyptic number.

It is an amenable number.

238920013 is a deficient number, since it is larger than the sum of its proper divisors (1).

238920013 is an equidigital number, since it uses as much as digits as its factorization.

238920013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 238920013 is about 15457.0376527975. The cubic root of 238920013 is about 620.5129409325.

Adding to 238920013 its reverse (310029832), we get a palindrome (548949845).

The spelling of 238920013 in words is "two hundred thirty-eight million, nine hundred twenty thousand, thirteen".