8398987673 has 2 divisors, whose sum is σ = 8398987674. Its totient is φ = 8398987672.

The previous prime is 8398987669. The next prime is 8398987687. The reversal of 8398987673 is 3767898938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7356149824 + 1042837849 = 85768^2 + 32293^2 .

It is a cyclic number.

It is not a de Polignac number, because 8398987673 - 2² = 8398987669 is a prime.

It is not a weakly prime, because it can be changed into another prime (8398987603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4199493836 + 4199493837.

It is an arithmetic number, because the mean of its divisors is an integer number (4199493837).

Almost surely, 2^8398987673 is an apocalyptic number.

It is an amenable number.

8398987673 is a deficient number, since it is larger than the sum of its proper divisors (1).

8398987673 is an equidigital number, since it uses as much as digits as its factorization.

8398987673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109734912, while the sum is 68.

The square root of 8398987673 is about 91645.9910361604. The cubic root of 8398987673 is about 2032.7110495971.

The spelling of 8398987673 in words is "eight billion, three hundred ninety-eight million, nine hundred eighty-seven thousand, six hundred seventy-three".