2678591 has 2 divisors, whose sum is σ = 2678592. Its totient is φ = 2678590.

The previous prime is 2678587. The next prime is 2678597. The reversal of 2678591 is 1958762.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2678591 - 2² = 2678587 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2678597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339295 + 1339296.

It is an arithmetic number, because the mean of its divisors is an integer number (1339296).

2^2678591 is an apocalyptic number.

2678591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2678591 is an equidigital number, since it uses as much as digits as its factorization.

2678591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 2678591 is about 1636.6401559292. The cubic root of 2678591 is about 138.8786443170.

The spelling of 2678591 in words is "two million, six hundred seventy-eight thousand, five hundred ninety-one".