2698668989 has 2 divisors, whose sum is σ = 2698668990. Its totient is φ = 2698668988.

The previous prime is 2698668953. The next prime is 2698668991. The reversal of 2698668989 is 9898668962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1854766489 + 843902500 = 43067^2 + 29050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2698668989 - 2⁸ = 2698668733 is a prime.

Together with 2698668991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2698665989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1349334494 + 1349334495.

It is an arithmetic number, because the mean of its divisors is an integer number (1349334495).

Almost surely, 2^2698668989 is an apocalyptic number.

It is an amenable number.

2698668989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2698668989 is an equidigital number, since it uses as much as digits as its factorization.

2698668989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161243136, while the sum is 71.

The square root of 2698668989 is about 51948.7149889196. The cubic root of 2698668989 is about 1392.2477974447.

The spelling of 2698668989 in words is "two billion, six hundred ninety-eight million, six hundred sixty-eight thousand, nine hundred eighty-nine".