8117899 has 2 divisors, whose sum is σ = 8117900. Its totient is φ = 8117898.

The previous prime is 8117881. The next prime is 8117903. The reversal of 8117899 is 9987118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8117899 - 2⁵ = 8117867 is a prime.

8117899 is a lucky number.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (8117839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4058949 + 4058950.

It is an arithmetic number, because the mean of its divisors is an integer number (4058950).

Almost surely, 2^8117899 is an apocalyptic number.

8117899 is a deficient number, since it is larger than the sum of its proper divisors (1).

8117899 is an equidigital number, since it uses as much as digits as its factorization.

8117899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 43.

The square root of 8117899 is about 2849.1926926763. The cubic root of 8117899 is about 200.9777043494.

The spelling of 8117899 in words is "eight million, one hundred seventeen thousand, eight hundred ninety-nine".