6947561 has 2 divisors, whose sum is σ = 6947562. Its totient is φ = 6947560.

The previous prime is 6947557. The next prime is 6947581. The reversal of 6947561 is 1657496.

6947561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4326400 + 2621161 = 2080^2 + 1619^2 .

It is a cyclic number.

It is not a de Polignac number, because 6947561 - 2² = 6947557 is a prime.

It is not a weakly prime, because it can be changed into another prime (6947531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3473780 + 3473781.

It is an arithmetic number, because the mean of its divisors is an integer number (3473781).

Almost surely, 2^6947561 is an apocalyptic number.

It is an amenable number.

6947561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6947561 is an equidigital number, since it uses as much as digits as its factorization.

6947561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 6947561 is about 2635.8226419849. The cubic root of 6947561 is about 190.8142433480.

The spelling of 6947561 in words is "six million, nine hundred forty-seven thousand, five hundred sixty-one".