7897228489 has 4 divisors (see below), whose sum is σ = 8089843860. Its totient is φ = 7704613120.

The previous prime is 7897228477. The next prime is 7897228523. The reversal of 7897228489 is 9848227987.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3462734025 + 4434494464 = 58845^2 + 66592^2 .

It is a cyclic number.

It is not a de Polignac number, because 7897228489 - 2⁹ = 7897227977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7897228489.

It is not an unprimeable number, because it can be changed into a prime (7897228429) 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, 96307624 + ... + 96307705.

It is an arithmetic number, because the mean of its divisors is an integer number (2022460965).

Almost surely, 2^7897228489 is an apocalyptic number.

It is an amenable number.

7897228489 is a deficient number, since it is larger than the sum of its proper divisors (192615371).

7897228489 is a wasteful number, since it uses less digits than its factorization.

7897228489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192615370.

The product of its digits is 32514048, while the sum is 64.

The square root of 7897228489 is about 88866.3518380270. The cubic root of 7897228489 is about 1991.3987698642.

The spelling of 7897228489 in words is "seven billion, eight hundred ninety-seven million, two hundred twenty-eight thousand, four hundred eighty-nine".