2663947 has 12 divisors (see below), whose sum is σ = 3149064. Its totient is φ = 2233920.

The previous prime is 2663897. The next prime is 2663953. The reversal of 2663947 is 7493662.

It is not a de Polignac number, because 2663947 - 2¹¹ = 2661899 is a prime.

It is a super-2 number, since 2×2663947² = 14193227237618, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2²¹ + 6⁷ + 6⁷ + 3 + 9⁴ + 4² + 7³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2663977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1143 + ... + 2575.

It is an arithmetic number, because the mean of its divisors is an integer number (262422).

2^2663947 is an apocalyptic number.

2663947 is a deficient number, since it is larger than the sum of its proper divisors (485117).

2663947 is a wasteful number, since it uses less digits than its factorization.

2663947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470 (or 1457 counting only the distinct ones).

The product of its digits is 54432, while the sum is 37.

The square root of 2663947 is about 1632.1602249779. The cubic root of 2663947 is about 138.6250960458.

The spelling of 2663947 in words is "two million, six hundred sixty-three thousand, nine hundred forty-seven".