238623557 has 2 divisors, whose sum is σ = 238623558. Its totient is φ = 238623556.

The previous prime is 238623533. The next prime is 238623587. The reversal of 238623557 is 755326832.

238623557 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., 131583841 + 107039716 = 11471^2 + 10346^2 .

It is a cyclic number.

It is not a de Polignac number, because 238623557 - 2²² = 234429253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238623587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119311778 + 119311779.

It is an arithmetic number, because the mean of its divisors is an integer number (119311779).

Almost surely, 2^238623557 is an apocalyptic number.

It is an amenable number.

238623557 is a deficient number, since it is larger than the sum of its proper divisors (1).

238623557 is an equidigital number, since it uses as much as digits as its factorization.

238623557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 41.

The square root of 238623557 is about 15447.4449990929. Note that the first 3 decimals coincide. The cubic root of 238623557 is about 620.2561870517.

The spelling of 238623557 in words is "two hundred thirty-eight million, six hundred twenty-three thousand, five hundred fifty-seven".