7998392851 has 2 divisors, whose sum is σ = 7998392852. Its totient is φ = 7998392850.

The previous prime is 7998392827. The next prime is 7998392867. The reversal of 7998392851 is 1582938997.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7998392851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7998392851.

It is not a weakly prime, because it can be changed into another prime (7998392251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3999196425 + 3999196426.

It is an arithmetic number, because the mean of its divisors is an integer number (3999196426).

Almost surely, 2^7998392851 is an apocalyptic number.

7998392851 is a deficient number, since it is larger than the sum of its proper divisors (1).

7998392851 is an equidigital number, since it uses as much as digits as its factorization.

7998392851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9797760, while the sum is 61.

The square root of 7998392851 is about 89433.7344126924. The cubic root of 7998392851 is about 1999.8660619472.

The spelling of 7998392851 in words is "seven billion, nine hundred ninety-eight million, three hundred ninety-two thousand, eight hundred fifty-one".