4381318987 has 2 divisors, whose sum is σ = 4381318988. Its totient is φ = 4381318986.

The previous prime is 4381318979. The next prime is 4381319017. The reversal of 4381318987 is 7898131834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4381318987 - 2³ = 4381318979 is a prime.

It is not a weakly prime, because it can be changed into another prime (4381318957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2190659493 + 2190659494.

It is an arithmetic number, because the mean of its divisors is an integer number (2190659494).

Almost surely, 2^4381318987 is an apocalyptic number.

4381318987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4381318987 is an equidigital number, since it uses as much as digits as its factorization.

4381318987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 52.

The square root of 4381318987 is about 66191.5325929231. The cubic root of 4381318987 is about 1636.3201982200.

The spelling of 4381318987 in words is "four billion, three hundred eighty-one million, three hundred eighteen thousand, nine hundred eighty-seven".