947663 has 4 divisors (see below), whose sum is σ = 997560. Its totient is φ = 897768.

The previous prime is 947659. The next prime is 947707. The reversal of 947663 is 366749.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366749 = 137 ⋅2677.

It is a cyclic number.

It is not a de Polignac number, because 947663 - 2² = 947659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947603) 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, 24920 + ... + 24957.

It is an arithmetic number, because the mean of its divisors is an integer number (249390).

2⁹⁴⁷⁶⁶³ is an apocalyptic number.

947663 is a deficient number, since it is larger than the sum of its proper divisors (49897).

947663 is a wasteful number, since it uses less digits than its factorization.

947663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49896.

The product of its digits is 27216, while the sum is 35.

The square root of 947663 is about 973.4798405720. The cubic root of 947663 is about 98.2240811576.

The spelling of 947663 in words is "nine hundred forty-seven thousand, six hundred sixty-three".