2668399 has 2 divisors, whose sum is σ = 2668400. Its totient is φ = 2668398.

The previous prime is 2668363. The next prime is 2668411. The reversal of 2668399 is 9938662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2668399 - 2⁷ = 2668271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2668199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334199 + 1334200.

It is an arithmetic number, because the mean of its divisors is an integer number (1334200).

2^2668399 is an apocalyptic number.

2668399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668399 is an equidigital number, since it uses as much as digits as its factorization.

2668399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 2668399 is about 1633.5234923318. The cubic root of 2668399 is about 138.7022766913.

The spelling of 2668399 in words is "two million, six hundred sixty-eight thousand, three hundred ninety-nine".