7991628959 has 2 divisors, whose sum is σ = 7991628960. Its totient is φ = 7991628958.

The previous prime is 7991628929. The next prime is 7991628979. The reversal of 7991628959 is 9598261997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7991628959 - 2¹⁶ = 7991563423 is a prime.

It is a super-2 number, since 2×7991628959² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7991628895 and 7991628904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7991628929) 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, 3995814479 + 3995814480.

It is an arithmetic number, because the mean of its divisors is an integer number (3995814480).

Almost surely, 2^7991628959 is an apocalyptic number.

7991628959 is a deficient number, since it is larger than the sum of its proper divisors (1).

7991628959 is an equidigital number, since it uses as much as digits as its factorization.

7991628959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22044960, while the sum is 65.

The square root of 7991628959 is about 89395.9113103055. The cubic root of 7991628959 is about 1999.3021697948.

The spelling of 7991628959 in words is "seven billion, nine hundred ninety-one million, six hundred twenty-eight thousand, nine hundred fifty-nine".