6890641 has 2 divisors, whose sum is σ = 6890642. Its totient is φ = 6890640.

The previous prime is 6890633. The next prime is 6890651. The reversal of 6890641 is 1460986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6890625 + 16 = 2625^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 6890641 - 2³ = 6890633 is a prime.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 6890597 and 6890606.

It is not a weakly prime, because it can be changed into another prime (6890651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3445320 + 3445321.

It is an arithmetic number, because the mean of its divisors is an integer number (3445321).

Almost surely, 2^6890641 is an apocalyptic number.

It is an amenable number.

6890641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6890641 is an equidigital number, since it uses as much as digits as its factorization.

6890641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6890641 is about 2625.0030476173. The cubic root of 6890641 is about 190.2917125608.

It can be divided in two parts, 68 and 90641, that added together give a palindrome (90709).

The spelling of 6890641 in words is "six million, eight hundred ninety thousand, six hundred forty-one".