6553969 has 2 divisors, whose sum is σ = 6553970. Its totient is φ = 6553968.

The previous prime is 6553961. The next prime is 6553979. The reversal of 6553969 is 9693556.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5085025 + 1468944 = 2255^2 + 1212^2 .

It is a cyclic number.

It is not a de Polignac number, because 6553969 - 2³ = 6553961 is a prime.

It is a super-2 number, since 2×6553969² = 85909019305922, which contains 22 as substring.

6553969 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6553961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3276984 + 3276985.

It is an arithmetic number, because the mean of its divisors is an integer number (3276985).

Almost surely, 2^6553969 is an apocalyptic number.

It is an amenable number.

6553969 is a deficient number, since it is larger than the sum of its proper divisors (1).

6553969 is an equidigital number, since it uses as much as digits as its factorization.

6553969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 218700, while the sum is 43.

The square root of 6553969 is about 2560.0720692981. The cubic root of 6553969 is about 187.1406474276.

It can be divided in two parts, 655 and 3969, that added together give a square (4624 = 68²).

The spelling of 6553969 in words is "six million, five hundred fifty-three thousand, nine hundred sixty-nine".