2678691 has 8 divisors (see below), whose sum is σ = 3579904. Its totient is φ = 1781640.

The previous prime is 2678681. The next prime is 2678699. The reversal of 2678691 is 1968762.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2678691 - 2¹¹ = 2676643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2678699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086 + ... + 2556.

It is an arithmetic number, because the mean of its divisors is an integer number (447488).

2^2678691 is an apocalyptic number.

2678691 is a deficient number, since it is larger than the sum of its proper divisors (901213).

2678691 is a wasteful number, since it uses less digits than its factorization.

2678691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081.

The product of its digits is 36288, while the sum is 39.

The square root of 2678691 is about 1636.6707060371. The cubic root of 2678691 is about 138.8803725504.

The spelling of 2678691 in words is "two million, six hundred seventy-eight thousand, six hundred ninety-one".