7989459109 has 2 divisors, whose sum is σ = 7989459110. Its totient is φ = 7989459108.

The previous prime is 7989459059. The next prime is 7989459151. The reversal of 7989459109 is 9019549897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7160882884 + 828576225 = 84622^2 + 28785^2 .

It is a cyclic number.

It is not a de Polignac number, because 7989459109 - 2²³ = 7981070501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7989459409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3994729554 + 3994729555.

It is an arithmetic number, because the mean of its divisors is an integer number (3994729555).

Almost surely, 2^7989459109 is an apocalyptic number.

It is an amenable number.

7989459109 is a deficient number, since it is larger than the sum of its proper divisors (1).

7989459109 is an equidigital number, since it uses as much as digits as its factorization.

7989459109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 61.

The square root of 7989459109 is about 89383.7743049598. The cubic root of 7989459109 is about 1999.1212063341.

The spelling of 7989459109 in words is "seven billion, nine hundred eighty-nine million, four hundred fifty-nine thousand, one hundred nine".