2644247 has 2 divisors, whose sum is σ = 2644248. Its totient is φ = 2644246.

The previous prime is 2644219. The next prime is 2644261. The reversal of 2644247 is 7424462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2644247 - 2⁶ = 2644183 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6⁴ + 4⁵ + 4⁶ + 2²¹ + 4⁷ + 7 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2644277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322123 + 1322124.

It is an arithmetic number, because the mean of its divisors is an integer number (1322124).

2^2644247 is an apocalyptic number.

2644247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644247 is an equidigital number, since it uses as much as digits as its factorization.

2644247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 29.

The square root of 2644247 is about 1626.1140796389. The cubic root of 2644247 is about 138.2825374379.

The spelling of 2644247 in words is "two million, six hundred forty-four thousand, two hundred forty-seven".