971669 has 8 divisors (see below), whose sum is σ = 1046808. Its totient is φ = 898560.

The previous prime is 971653. The next prime is 971683. The reversal of 971669 is 966179.

It can be written as a sum of positive squares in 4 ways, for example, as 1444 + 970225 = 38^2 + 985^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 971669 - 2⁴ = 971653 is a prime.

It is a super-2 number, since 2×971669² = 1888281291122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971639) 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, 569 + ... + 1505.

It is an arithmetic number, because the mean of its divisors is an integer number (130851).

2⁹⁷¹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

971669 is a deficient number, since it is larger than the sum of its proper divisors (75139).

971669 is a wasteful number, since it uses less digits than its factorization.

971669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015.

The product of its digits is 20412, while the sum is 38.

The square root of 971669 is about 985.7327223949. The cubic root of 971669 is about 99.0465719730.

The spelling of 971669 in words is "nine hundred seventy-one thousand, six hundred sixty-nine".