2640137 has 2 divisors, whose sum is σ = 2640138. Its totient is φ = 2640136.

The previous prime is 2640067. The next prime is 2640139. The reversal of 2640137 is 7310462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1597696 + 1042441 = 1264^2 + 1021^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640137 - 2⁸ = 2639881 is a prime.

Together with 2640139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2640139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320068 + 1320069.

It is an arithmetic number, because the mean of its divisors is an integer number (1320069).

2^2640137 is an apocalyptic number.

It is an amenable number.

2640137 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640137 is an equidigital number, since it uses as much as digits as its factorization.

2640137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 2640137 is about 1624.8498392159. The cubic root of 2640137 is about 138.2108552861.

Adding to 2640137 its reverse (7310462), we get a palindrome (9950599).

The spelling of 2640137 in words is "two million, six hundred forty thousand, one hundred thirty-seven".