6168649 has 2 divisors, whose sum is σ = 6168650. Its totient is φ = 6168648.

The previous prime is 6168647. The next prime is 6168667. The reversal of 6168649 is 9468616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5322249 + 846400 = 2307^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 6168649 - 2¹ = 6168647 is a prime.

Together with 6168647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6168647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3084324 + 3084325.

It is an arithmetic number, because the mean of its divisors is an integer number (3084325).

Almost surely, 2^6168649 is an apocalyptic number.

It is an amenable number.

6168649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6168649 is an equidigital number, since it uses as much as digits as its factorization.

6168649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 6168649 is about 2483.6765087265. The cubic root of 6168649 is about 183.3988830800.

The spelling of 6168649 in words is "six million, one hundred sixty-eight thousand, six hundred forty-nine".