2639449 has 4 divisors (see below), whose sum is σ = 2643840. Its totient is φ = 2635060.

The previous prime is 2639447. The next prime is 2639477. The reversal of 2639449 is 9449362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2639449 - 2¹ = 2639447 is a prime.

It is a Duffinian number.

2639449 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2639447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1117 + ... + 2554.

It is an arithmetic number, because the mean of its divisors is an integer number (660960).

2^2639449 is an apocalyptic number.

It is an amenable number.

2639449 is a deficient number, since it is larger than the sum of its proper divisors (4391).

2639449 is an equidigital number, since it uses as much as digits as its factorization.

2639449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4390.

The product of its digits is 46656, while the sum is 37.

The square root of 2639449 is about 1624.6381135502. The cubic root of 2639449 is about 138.1988486706.

The spelling of 2639449 in words is "two million, six hundred thirty-nine thousand, four hundred forty-nine".