6900689 has 2 divisors, whose sum is σ = 6900690. Its totient is φ = 6900688.

The previous prime is 6900679. The next prime is 6900727. The reversal of 6900689 is 9860096.

It is an a-pointer prime, because the next prime (6900727) can be obtained adding 6900689 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6076225 + 824464 = 2465^2 + 908^2 .

It is a cyclic number.

It is not a de Polignac number, because 6900689 - 2⁸ = 6900433 is a prime.

It is not a weakly prime, because it can be changed into another prime (6900659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3450344 + 3450345.

It is an arithmetic number, because the mean of its divisors is an integer number (3450345).

Almost surely, 2^6900689 is an apocalyptic number.

It is an amenable number.

6900689 is a deficient number, since it is larger than the sum of its proper divisors (1).

6900689 is an equidigital number, since it uses as much as digits as its factorization.

6900689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 6900689 is about 2626.9162529476. The cubic root of 6900689 is about 190.3841627160.

The spelling of 6900689 in words is "six million, nine hundred thousand, six hundred eighty-nine".