8198756987 has 2 divisors, whose sum is σ = 8198756988. Its totient is φ = 8198756986.

The previous prime is 8198756963. The next prime is 8198757001. The reversal of 8198756987 is 7896578918.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8198756987 is a prime.

It is a super-2 number, since 2×8198756987² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8198756927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4099378493 + 4099378494.

It is an arithmetic number, because the mean of its divisors is an integer number (4099378494).

Almost surely, 2^8198756987 is an apocalyptic number.

8198756987 is a deficient number, since it is larger than the sum of its proper divisors (1).

8198756987 is an equidigital number, since it uses as much as digits as its factorization.

8198756987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60963840, while the sum is 68.

The square root of 8198756987 is about 90546.9877301283. The cubic root of 8198756987 is about 2016.4277768739.

The spelling of 8198756987 in words is "eight billion, one hundred ninety-eight million, seven hundred fifty-six thousand, nine hundred eighty-seven".