2782631 has 2 divisors, whose sum is σ = 2782632. Its totient is φ = 2782630.

The previous prime is 2782613. The next prime is 2782643. The reversal of 2782631 is 1362872.

It is a happy number.

Together with previous prime (2782613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2782631 - 2⁶ = 2782567 is a prime.

It is a super-2 number, since 2×2782631² = 15486070564322, 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 = 2782594 and 2782603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2782601) 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 as a sum of consecutive naturals, namely, 1391315 + 1391316.

It is an arithmetic number, because the mean of its divisors is an integer number (1391316).

2^2782631 is an apocalyptic number.

2782631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2782631 is an equidigital number, since it uses as much as digits as its factorization.

2782631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 2782631 is about 1668.1219979366. The cubic root of 2782631 is about 140.6539305745.

The spelling of 2782631 in words is "two million, seven hundred eighty-two thousand, six hundred thirty-one".