2663949 has 8 divisors (see below), whose sum is σ = 3560032. Its totient is φ = 1771920.

The previous prime is 2663897. The next prime is 2663953. The reversal of 2663949 is 9493662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2663949 - 2⁸ = 2663693 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 6⁷ + 6⁷ + 3³ + 9² + 4⁴ + 9⁴ .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1239 + ... + 2619.

It is an arithmetic number, because the mean of its divisors is an integer number (445004).

2^2663949 is an apocalyptic number.

It is an amenable number.

2663949 is a deficient number, since it is larger than the sum of its proper divisors (896083).

2663949 is a wasteful number, since it uses less digits than its factorization.

2663949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027.

The product of its digits is 69984, while the sum is 39.

The square root of 2663949 is about 1632.1608376628. The cubic root of 2663949 is about 138.6251307375.

The spelling of 2663949 in words is "two million, six hundred sixty-three thousand, nine hundred forty-nine".