5281993 has 2 divisors, whose sum is σ = 5281994. Its totient is φ = 5281992.

The previous prime is 5281979. The next prime is 5281999. The reversal of 5281993 is 3991825.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3873024 + 1408969 = 1968^2 + 1187^2 .

It is a cyclic number.

It is not a de Polignac number, because 5281993 - 2¹⁷ = 5150921 is a prime.

5281993 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (5281999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2640996 + 2640997.

It is an arithmetic number, because the mean of its divisors is an integer number (2640997).

Almost surely, 2^5281993 is an apocalyptic number.

It is an amenable number.

5281993 is a deficient number, since it is larger than the sum of its proper divisors (1).

5281993 is an equidigital number, since it uses as much as digits as its factorization.

5281993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 5281993 is about 2298.2586886597. The cubic root of 5281993 is about 174.1536604478.

The spelling of 5281993 in words is "five million, two hundred eighty-one thousand, nine hundred ninety-three".