2489947 has 2 divisors, whose sum is σ = 2489948. Its totient is φ = 2489946.

The previous prime is 2489933. The next prime is 2489999. The reversal of 2489947 is 7499842.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2489947 - 2¹⁵ = 2457179 is a prime.

It is not a weakly prime, because it can be changed into another prime (2489147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244973 + 1244974.

It is an arithmetic number, because the mean of its divisors is an integer number (1244974).

2^2489947 is an apocalyptic number.

2489947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489947 is an equidigital number, since it uses as much as digits as its factorization.

2489947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 2489947 is about 1577.9565900239. The cubic root of 2489947 is about 135.5387161689.

It can be divided in two parts, 248994 and 7, that added together give a square (249001 = 499²).

The spelling of 2489947 in words is "two million, four hundred eighty-nine thousand, nine hundred forty-seven".