2257993 has 4 divisors (see below), whose sum is σ = 2313108. Its totient is φ = 2202880.

The previous prime is 2257987. The next prime is 2258023. The reversal of 2257993 is 3997522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3997522 = 2 ⋅1998761.

It can be written as a sum of positive squares in 2 ways, for example, as 1108809 + 1149184 = 1053^2 + 1072^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257993 - 2⁵ = 2257961 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 2²¹ + 5⁵ + 7⁶ + 9 + 9³ + 3⁸ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2257943) 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, 27496 + ... + 27577.

It is an arithmetic number, because the mean of its divisors is an integer number (578277).

2^2257993 is an apocalyptic number.

It is an amenable number.

2257993 is a deficient number, since it is larger than the sum of its proper divisors (55115).

2257993 is an equidigital number, since it uses as much as digits as its factorization.

2257993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55114.

The product of its digits is 34020, while the sum is 37.

The square root of 2257993 is about 1502.6619713029. The cubic root of 2257993 is about 131.1920536346.

The spelling of 2257993 in words is "two million, two hundred fifty-seven thousand, nine hundred ninety-three".