7975775789 has 2 divisors, whose sum is σ = 7975775790. Its totient is φ = 7975775788.

The previous prime is 7975775767. The next prime is 7975775807. The reversal of 7975775789 is 9875775797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4037585764 + 3938190025 = 63542^2 + 62755^2 .

It is a cyclic number.

It is not a de Polignac number, because 7975775789 - 2¹² = 7975771693 is a prime.

It is a super-2 number, since 2×7975775789² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7975775189) 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, 3987887894 + 3987887895.

It is an arithmetic number, because the mean of its divisors is an integer number (3987887895).

Almost surely, 2^7975775789 is an apocalyptic number.

It is an amenable number.

7975775789 is a deficient number, since it is larger than the sum of its proper divisors (1).

7975775789 is an equidigital number, since it uses as much as digits as its factorization.

7975775789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272273400, while the sum is 71.

The square root of 7975775789 is about 89307.1989763423. The cubic root of 7975775789 is about 1997.9792747724.

The spelling of 7975775789 in words is "seven billion, nine hundred seventy-five million, seven hundred seventy-five thousand, seven hundred eighty-nine".