8081399959 has 2 divisors, whose sum is σ = 8081399960. Its totient is φ = 8081399958.

The previous prime is 8081399947. The next prime is 8081400011. The reversal of 8081399959 is 9599931808.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8081399959 - 2⁷ = 8081399831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8081399897 and 8081399906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8081319959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4040699979 + 4040699980.

It is an arithmetic number, because the mean of its divisors is an integer number (4040699980).

Almost surely, 2^8081399959 is an apocalyptic number.

8081399959 is a deficient number, since it is larger than the sum of its proper divisors (1).

8081399959 is an equidigital number, since it uses as much as digits as its factorization.

8081399959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 61.

The square root of 8081399959 is about 89896.6070494321. The cubic root of 8081399959 is about 2006.7604523108.

The spelling of 8081399959 in words is "eight billion, eighty-one million, three hundred ninety-nine thousand, nine hundred fifty-nine".