2668249 has 2 divisors, whose sum is σ = 2668250. Its totient is φ = 2668248.

The previous prime is 2668247. The next prime is 2668271. The reversal of 2668249 is 9428662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2449225 + 219024 = 1565^2 + 468^2 .

It is a cyclic number.

It is not a de Polignac number, because 2668249 - 2¹ = 2668247 is a prime.

Together with 2668247, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 2 + 6 + 6⁶ + 8⁷ + 2¹⁹ + 4³ + 9² .

2668249 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2668241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334124 + 1334125.

It is an arithmetic number, because the mean of its divisors is an integer number (1334125).

2^2668249 is an apocalyptic number.

It is an amenable number.

2668249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668249 is an equidigital number, since it uses as much as digits as its factorization.

2668249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 2668249 is about 1633.4775786646. The cubic root of 2668249 is about 138.6996776633.

It can be divided in two parts, 266 and 8249, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 2668249 in words is "two million, six hundred sixty-eight thousand, two hundred forty-nine".