6553949 has 2 divisors, whose sum is σ = 6553950. Its totient is φ = 6553948.

The previous prime is 6553933. The next prime is 6553951. The reversal of 6553949 is 9493556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4644025 + 1909924 = 2155^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 6553949 - 2⁴ = 6553933 is a prime.

Together with 6553951, 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 (6553909) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3276974 + 3276975.

It is an arithmetic number, because the mean of its divisors is an integer number (3276975).

Almost surely, 2^6553949 is an apocalyptic number.

It is an amenable number.

6553949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6553949 is an equidigital number, since it uses as much as digits as its factorization.

6553949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 41.

The square root of 6553949 is about 2560.0681631550. The cubic root of 6553949 is about 187.1404570688.

The spelling of 6553949 in words is "six million, five hundred fifty-three thousand, nine hundred forty-nine".