2678831 has 2 divisors, whose sum is σ = 2678832. Its totient is φ = 2678830.

The previous prime is 2678807. The next prime is 2678839. The reversal of 2678831 is 1388762.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2678831 is a prime.

It is a super-2 number, since 2×2678831² = 14352271053122, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2678791 and 2678800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2678839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339415 + 1339416.

It is an arithmetic number, because the mean of its divisors is an integer number (1339416).

2^2678831 is an apocalyptic number.

2678831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2678831 is an equidigital number, since it uses as much as digits as its factorization.

2678831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 2678831 is about 1636.7134752302. The cubic root of 2678831 is about 138.8827920050.

The spelling of 2678831 in words is "two million, six hundred seventy-eight thousand, eight hundred thirty-one".