238557887 has 2 divisors, whose sum is σ = 238557888. Its totient is φ = 238557886.

The previous prime is 238557881. The next prime is 238557911. The reversal of 238557887 is 788755832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238557887 - 2⁴ = 238557871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238557881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119278943 + 119278944.

It is an arithmetic number, because the mean of its divisors is an integer number (119278944).

Almost surely, 2^238557887 is an apocalyptic number.

238557887 is a deficient number, since it is larger than the sum of its proper divisors (1).

238557887 is an equidigital number, since it uses as much as digits as its factorization.

238557887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3763200, while the sum is 53.

The square root of 238557887 is about 15445.3192585974. The cubic root of 238557887 is about 620.1992829731.

The spelling of 238557887 in words is "two hundred thirty-eight million, five hundred fifty-seven thousand, eight hundred eighty-seven".