699999999989 has 2 divisors, whose sum is σ = 699999999990. Its totient is φ = 699999999988.

The previous prime is 699999999983. The next prime is 700000000009. The reversal of 699999999989 is 989999999996.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 683879380900 + 16120619089 = 826970^2 + 126967^2 .

It is a cyclic number.

It is not a de Polignac number, because 699999999989 - 2⁸ = 699999999733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 699999999892 and 699999999901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699999999983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349999999994 + 349999999995.

It is an arithmetic number, because the mean of its divisors is an integer number (349999999995).

Almost surely, 2^699999999989 is an apocalyptic number.

It is an amenable number.

699999999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

699999999989 is an equidigital number, since it uses as much as digits as its factorization.

699999999989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 167365651248, while the sum is 104.

It can be divided in two parts, 69999999998 and 9, that added together give a palindrome (70000000007).

The spelling of 699999999989 in words is "six hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-nine".