2641631 has 2 divisors, whose sum is σ = 2641632. Its totient is φ = 2641630.

The previous prime is 2641577. The next prime is 2641633. The reversal of 2641631 is 1361462.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2641631 - 2⁶ = 2641567 is a prime.

It is a super-2 number, since 2×2641631² = 13956428680322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2641633, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2641597 and 2641606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2641633) 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, 1320815 + 1320816.

It is an arithmetic number, because the mean of its divisors is an integer number (1320816).

2^2641631 is an apocalyptic number.

2641631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2641631 is an equidigital number, since it uses as much as digits as its factorization.

2641631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 2641631 is about 1625.3095089859. The cubic root of 2641631 is about 138.2369206104.

The spelling of 2641631 in words is "two million, six hundred forty-one thousand, six hundred thirty-one".