7668139 has 16 divisors (see below), whose sum is σ = 8503488. Its totient is φ = 6884352.

The previous prime is 7668137. The next prime is 7668149. The reversal of 7668139 is 9318667.

It is a cyclic number.

It is not a de Polignac number, because 7668139 - 2¹ = 7668137 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7668137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45834 + ... + 46000.

It is an arithmetic number, because the mean of its divisors is an integer number (531468).

Almost surely, 2^7668139 is an apocalyptic number.

7668139 is a deficient number, since it is larger than the sum of its proper divisors (835349).

7668139 is a wasteful number, since it uses less digits than its factorization.

7668139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294.

The product of its digits is 54432, while the sum is 40.

The square root of 7668139 is about 2769.1404803657. The cubic root of 7668139 is about 197.1953450674.

The spelling of 7668139 in words is "seven million, six hundred sixty-eight thousand, one hundred thirty-nine".