4238317987 has 2 divisors, whose sum is σ = 4238317988. Its totient is φ = 4238317986.

The previous prime is 4238317961. The next prime is 4238317997. The reversal of 4238317987 is 7897138324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4238317987 - 2¹⁹ = 4237793699 is a prime.

It is not a weakly prime, because it can be changed into another prime (4238317927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2119158993 + 2119158994.

It is an arithmetic number, because the mean of its divisors is an integer number (2119158994).

Almost surely, 2^4238317987 is an apocalyptic number.

4238317987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4238317987 is an equidigital number, since it uses as much as digits as its factorization.

4238317987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 4238317987 is about 65102.3654485764. The cubic root of 4238317987 is about 1618.3204137619.

The spelling of 4238317987 in words is "four billion, two hundred thirty-eight million, three hundred seventeen thousand, nine hundred eighty-seven".