238870987 has 2 divisors, whose sum is σ = 238870988. Its totient is φ = 238870986.

The previous prime is 238870981. The next prime is 238870991. The reversal of 238870987 is 789078832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238870987 - 2¹⁹ = 238346699 is a prime.

It is not a weakly prime, because it can be changed into another prime (238870981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119435493 + 119435494.

It is an arithmetic number, because the mean of its divisors is an integer number (119435494).

Almost surely, 2^238870987 is an apocalyptic number.

238870987 is a deficient number, since it is larger than the sum of its proper divisors (1).

238870987 is an equidigital number, since it uses as much as digits as its factorization.

238870987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The square root of 238870987 is about 15455.4516918788. The cubic root of 238870987 is about 620.4704952787.

The spelling of 238870987 in words is "two hundred thirty-eight million, eight hundred seventy thousand, nine hundred eighty-seven".