6553961 has 2 divisors, whose sum is σ = 6553962. Its totient is φ = 6553960.

The previous prime is 6553957. The next prime is 6553969. The reversal of 6553961 is 1693556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 361 = 2560^2 + 19^2 .

It is a cyclic number.

It is not a de Polignac number, because 6553961 - 2² = 6553957 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6553969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3276980 + 3276981.

It is an arithmetic number, because the mean of its divisors is an integer number (3276981).

Almost surely, 2^6553961 is an apocalyptic number.

It is an amenable number.

6553961 is a deficient number, since it is larger than the sum of its proper divisors (1).

6553961 is an equidigital number, since it uses as much as digits as its factorization.

6553961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 35.

The square root of 6553961 is about 2560.0705068416. The cubic root of 6553961 is about 187.1405712841.

The spelling of 6553961 in words is "six million, five hundred fifty-three thousand, nine hundred sixty-one".