2640947 has 2 divisors, whose sum is σ = 2640948. Its totient is φ = 2640946.

The previous prime is 2640941. The next prime is 2640959. The reversal of 2640947 is 7490462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2640947 - 2¹⁴ = 2624563 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320473 + 1320474.

It is an arithmetic number, because the mean of its divisors is an integer number (1320474).

2^2640947 is an apocalyptic number.

2640947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640947 is an equidigital number, since it uses as much as digits as its factorization.

2640947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 2640947 is about 1625.0990739029. The cubic root of 2640947 is about 138.2249883085.

The spelling of 2640947 in words is "two million, six hundred forty thousand, nine hundred forty-seven".