2668139 has 4 divisors (see below), whose sum is σ = 2754240. Its totient is φ = 2582040.

The previous prime is 2668129. The next prime is 2668163. The reversal of 2668139 is 9318662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2668139 - 2⁴ = 2668123 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6 + 6⁶ + 8⁷ + 1 + 3³ + 9 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2668099 and 2668108.

It is not an unprimeable number, because it can be changed into a prime (2668129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43004 + ... + 43065.

It is an arithmetic number, because the mean of its divisors is an integer number (688560).

2^2668139 is an apocalyptic number.

2668139 is a deficient number, since it is larger than the sum of its proper divisors (86101).

2668139 is an equidigital number, since it uses as much as digits as its factorization.

2668139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86100.

The product of its digits is 15552, while the sum is 35.

The square root of 2668139 is about 1633.4439078218. The cubic root of 2668139 is about 138.6977716475.

The spelling of 2668139 in words is "two million, six hundred sixty-eight thousand, one hundred thirty-nine".