973661 has 4 divisors (see below), whose sum is σ = 1048572. Its totient is φ = 898752.

The previous prime is 973657. The next prime is 973669. The reversal of 973661 is 166379.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166379 = 17 ⋅9787.

It can be written as a sum of positive squares in 2 ways, for example, as 42436 + 931225 = 206^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 973661 - 2² = 973657 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 (973669) 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, 37436 + ... + 37461.

It is an arithmetic number, because the mean of its divisors is an integer number (262143).

2⁹⁷³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

973661 is a deficient number, since it is larger than the sum of its proper divisors (74911).

973661 is a wasteful number, since it uses less digits than its factorization.

973661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74910.

The product of its digits is 6804, while the sum is 32.

The square root of 973661 is about 986.7426209504. The cubic root of 973661 is about 99.1142102658.

The spelling of 973661 in words is "nine hundred seventy-three thousand, six hundred sixty-one".