2640173 has 4 divisors (see below), whose sum is σ = 2643648. Its totient is φ = 2636700.

The previous prime is 2640167. The next prime is 2640181. The reversal of 2640173 is 3710462.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2640173 - 2¹⁰ = 2639149 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 (2640163) 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, 53 + ... + 2298.

It is an arithmetic number, because the mean of its divisors is an integer number (660912).

2^2640173 is an apocalyptic number.

It is an amenable number.

2640173 is a deficient number, since it is larger than the sum of its proper divisors (3475).

2640173 is a wasteful number, since it uses less digits than its factorization.

2640173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 2640173 is about 1624.8609171249. The cubic root of 2640173 is about 138.2114834818.

The spelling of 2640173 in words is "two million, six hundred forty thousand, one hundred seventy-three".