8381172487 has 2 divisors, whose sum is σ = 8381172488. Its totient is φ = 8381172486.

The previous prime is 8381172473. The next prime is 8381172511. The reversal of 8381172487 is 7842711838.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8381172487 - 2¹⁵ = 8381139719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8381172487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8381172407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4190586243 + 4190586244.

It is an arithmetic number, because the mean of its divisors is an integer number (4190586244).

Almost surely, 2^8381172487 is an apocalyptic number.

8381172487 is a deficient number, since it is larger than the sum of its proper divisors (1).

8381172487 is an equidigital number, since it uses as much as digits as its factorization.

8381172487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 602112, while the sum is 49.

The square root of 8381172487 is about 91548.7437761983. The cubic root of 8381172487 is about 2031.2728302513.

The spelling of 8381172487 in words is "eight billion, three hundred eighty-one million, one hundred seventy-two thousand, four hundred eighty-seven".