947669 has 4 divisors (see below), whose sum is σ = 988896. Its totient is φ = 906444.

The previous prime is 947659. The next prime is 947707. The reversal of 947669 is 966749.

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, and also an emirpimes, since its reverse is a distinct semiprime: 966749 = 7 ⋅138107.

It is a cyclic number.

It is not a de Polignac number, because 947669 - 2⁸ = 947413 is a prime.

It is a super-2 number, since 2×947669² = 1796153067122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 947669.

It is not an unprimeable number, because it can be changed into a prime (947659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20579 + ... + 20624.

It is an arithmetic number, because the mean of its divisors is an integer number (247224).

2⁹⁴⁷⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

947669 is a deficient number, since it is larger than the sum of its proper divisors (41227).

947669 is a wasteful number, since it uses less digits than its factorization.

947669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41226.

The product of its digits is 81648, while the sum is 41.

The square root of 947669 is about 973.4829222950. The cubic root of 947669 is about 98.2242884547.

The spelling of 947669 in words is "nine hundred forty-seven thousand, six hundred sixty-nine".