2678509831 has 2 divisors, whose sum is σ = 2678509832. Its totient is φ = 2678509830.

The previous prime is 2678509751. The next prime is 2678509843. The reversal of 2678509831 is 1389058762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2678509831 - 2¹⁹ = 2677985543 is a prime.

It is a super-2 number, since 2×2678509831² = 14348829829527297122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2678509871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339254915 + 1339254916.

It is an arithmetic number, because the mean of its divisors is an integer number (1339254916).

Almost surely, 2^2678509831 is an apocalyptic number.

2678509831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2678509831 is an equidigital number, since it uses as much as digits as its factorization.

2678509831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 2678509831 is about 51754.3218581791. The cubic root of 2678509831 is about 1388.7724149554.

The spelling of 2678509831 in words is "two billion, six hundred seventy-eight million, five hundred nine thousand, eight hundred thirty-one".