2287993 has 2 divisors, whose sum is σ = 2287994. Its totient is φ = 2287992.

The previous prime is 2287991. The next prime is 2288003. The reversal of 2287993 is 3997822.

2287993 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2286144 + 1849 = 1512^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 2287993 - 2¹ = 2287991 is a prime.

Together with 2287991, it forms a pair of twin primes.

2287993 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2287991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1143996 + 1143997.

It is an arithmetic number, because the mean of its divisors is an integer number (1143997).

2^2287993 is an apocalyptic number.

It is an amenable number.

2287993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2287993 is an equidigital number, since it uses as much as digits as its factorization.

2287993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 2287993 is about 1512.6113182176. The cubic root of 2287993 is about 131.7705111089.

The spelling of 2287993 in words is "two million, two hundred eighty-seven thousand, nine hundred ninety-three".