2173613 has 8 divisors (see below), whose sum is σ = 2380056. Its totient is φ = 1972800.

The previous prime is 2173601. The next prime is 2173643. The reversal of 2173613 is 3163712.

2173613 = 1042² + 1043².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 94249 + 2079364 = 307^2 + 1442^2 .

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 2173613 - 2⁸ = 2173357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173643) 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, 578 + ... + 2163.

It is an arithmetic number, because the mean of its divisors is an integer number (297507).

2^2173613 is an apocalyptic number.

2173613 is the 1043-rd centered square number.

It is an amenable number.

2173613 is a deficient number, since it is larger than the sum of its proper divisors (206443).

2173613 is a wasteful number, since it uses less digits than its factorization.

2173613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815.

The product of its digits is 756, while the sum is 23.

The square root of 2173613 is about 1474.3178083439. The cubic root of 2173613 is about 129.5370714219.

Subtracting 2173613 from its reverse (3163712), we obtain a palindrome (990099).

The spelling of 2173613 in words is "two million, one hundred seventy-three thousand, six hundred thirteen".