2947663 has 4 divisors (see below), whose sum is σ = 2955280. Its totient is φ = 2940048.

The previous prime is 2947661. The next prime is 2947669. The reversal of 2947663 is 3667492.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2947663 - 2¹ = 2947661 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 9² + 4⁶ + 7⁷ + 6² + 6⁴ + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2947661) 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, 3195 + ... + 4012.

It is an arithmetic number, because the mean of its divisors is an integer number (738820).

2^2947663 is an apocalyptic number.

2947663 is a deficient number, since it is larger than the sum of its proper divisors (7617).

2947663 is an equidigital number, since it uses as much as digits as its factorization.

2947663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7616.

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

The square root of 2947663 is about 1716.8759419364. The cubic root of 2947663 is about 143.3813318005.

The spelling of 2947663 in words is "two million, nine hundred forty-seven thousand, six hundred sixty-three".