7989669897 has 16 divisors (see below), whose sum is σ = 11996221440. Its totient is φ = 4686022800.

The previous prime is 7989669893. The next prime is 7989669937.

It is a happy number.

7989669897 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7989669897 - 2² = 7989669893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7989669893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3903997 + ... + 3906042.

It is an arithmetic number, because the mean of its divisors is an integer number (749763840).

Almost surely, 2^7989669897 is an apocalyptic number.

It is an amenable number.

7989669897 is a deficient number, since it is larger than the sum of its proper divisors (4006551543).

7989669897 is a wasteful number, since it uses less digits than its factorization.

7989669897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7810084.

The product of its digits is 740710656, while the sum is 78.

The square root of 7989669897 is about 89384.9534149904. The cubic root of 7989669897 is about 1999.1387872929.

The spelling of 7989669897 in words is "seven billion, nine hundred eighty-nine million, six hundred sixty-nine thousand, eight hundred ninety-seven".