2640343 has 2 divisors, whose sum is σ = 2640344. Its totient is φ = 2640342.

The previous prime is 2640317. The next prime is 2640347. The reversal of 2640343 is 3430462.

2640343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2640343 - 2¹³ = 2632151 is a prime.

It is a super-2 number, since 2×2640343² = 13942822315298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320171 + 1320172.

It is an arithmetic number, because the mean of its divisors is an integer number (1320172).

2^2640343 is an apocalyptic number.

2640343 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640343 is an equidigital number, since it uses as much as digits as its factorization.

2640343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 2640343 is about 1624.9132284525. The cubic root of 2640343 is about 138.2144498844.

The spelling of 2640343 in words is "two million, six hundred forty thousand, three hundred forty-three".