2665493 has 4 divisors (see below), whose sum is σ = 2781408. Its totient is φ = 2549580.

The previous prime is 2665483. The next prime is 2665499. The reversal of 2665493 is 3945662.

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.

It is a cyclic number.

It is not a de Polignac number, because 2665493 - 2⁸ = 2665237 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 (2665499) 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, 57923 + ... + 57968.

It is an arithmetic number, because the mean of its divisors is an integer number (695352).

2^2665493 is an apocalyptic number.

2665493 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2665493 is a deficient number, since it is larger than the sum of its proper divisors (115915).

2665493 is a wasteful number, since it uses less digits than its factorization.

2665493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115914.

The product of its digits is 38880, while the sum is 35.

The square root of 2665493 is about 1632.6337617482. The cubic root of 2665493 is about 138.6519075093.

The spelling of 2665493 in words is "two million, six hundred sixty-five thousand, four hundred ninety-three".