2489647 has 2 divisors, whose sum is σ = 2489648. Its totient is φ = 2489646.

The previous prime is 2489639. The next prime is 2489659. The reversal of 2489647 is 7469842.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2489647 - 2³ = 2489639 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2489687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244823 + 1244824.

It is an arithmetic number, because the mean of its divisors is an integer number (1244824).

2^2489647 is an apocalyptic number.

2489647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489647 is an equidigital number, since it uses as much as digits as its factorization.

2489647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 2489647 is about 1577.8615275112. The cubic root of 2489647 is about 135.5332725125.

It can be divided in two parts, 2489 and 647, that added together give a square (3136 = 56²).

The spelling of 2489647 in words is "two million, four hundred eighty-nine thousand, six hundred forty-seven".