7312289989 has 4 divisors (see below), whose sum is σ = 7320162060. Its totient is φ = 7304417920.

The previous prime is 7312289981. The next prime is 7312290023. The reversal of 7312289989 is 9899822137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9899822137 = 4463 ⋅2218199.

It can be written as a sum of positive squares in 2 ways, for example, as 2668548964 + 4643741025 = 51658^2 + 68145^2 .

It is a cyclic number.

It is not a de Polignac number, because 7312289989 - 2³ = 7312289981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7312289981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3934642 + ... + 3936499.

It is an arithmetic number, because the mean of its divisors is an integer number (1830040515).

Almost surely, 2^7312289989 is an apocalyptic number.

It is an amenable number.

7312289989 is a deficient number, since it is larger than the sum of its proper divisors (7872071).

7312289989 is an equidigital number, since it uses as much as digits as its factorization.

7312289989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7872070.

The product of its digits is 3919104, while the sum is 58.

The square root of 7312289989 is about 85511.9289280741. The cubic root of 7312289989 is about 1940.9654376531.

The spelling of 7312289989 in words is "seven billion, three hundred twelve million, two hundred eighty-nine thousand, nine hundred eighty-nine".