2631647 has 2 divisors, whose sum is σ = 2631648. Its totient is φ = 2631646.

The previous prime is 2631631. The next prime is 2631649. The reversal of 2631647 is 7461362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2631647 - 2⁴ = 2631631 is a prime.

Together with 2631649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2631649) 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, 1315823 + 1315824.

It is an arithmetic number, because the mean of its divisors is an integer number (1315824).

2^2631647 is an apocalyptic number.

2631647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2631647 is an equidigital number, since it uses as much as digits as its factorization.

2631647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 29.

The square root of 2631647 is about 1622.2351864018. The cubic root of 2631647 is about 138.0625460370.

The spelling of 2631647 in words is "two million, six hundred thirty-one thousand, six hundred forty-seven".