2643247 has 2 divisors, whose sum is σ = 2643248. Its totient is φ = 2643246.

The previous prime is 2643241. The next prime is 2643283. The reversal of 2643247 is 7423462.

2643247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2643247 - 2³ = 2643239 is a prime.

It is equal to p₁₉₂₇₉₀ and since 2643247 and 192790 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2643241) 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, 1321623 + 1321624.

It is an arithmetic number, because the mean of its divisors is an integer number (1321624).

2^2643247 is an apocalyptic number.

2643247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643247 is an equidigital number, since it uses as much as digits as its factorization.

2643247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 28.

The square root of 2643247 is about 1625.8065690604. The cubic root of 2643247 is about 138.2651033665.

The spelling of 2643247 in words is "two million, six hundred forty-three thousand, two hundred forty-seven".