Search a number
BaseRepresentation
bin1110101000001
3101021101
41311001
5214424
654401
730556
oct16501
911241
107489
115699
124401
133541
142a2d
152344
hex1d41

7489 has 2 divisors, whose sum is σ = 7490. Its totient is φ = 7488.

The previous prime is 7487. The next prime is 7499. The reversal of 7489 is 9847.

It can be divided in two parts, 748 and 9, that added together give a palindrome (757).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6400 + 1089 = 80^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 7489 - 21 = 7487 is a prime.

Together with 7487, it forms a pair of twin primes.

7489 is a lucky number.

It is a plaindrome in base 11 and base 15.

It is not a weakly prime, because it can be changed into another prime (7481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3744 + 3745.

It is an arithmetic number, because the mean of its divisors is an integer number (3745).

27489 is an apocalyptic number.

It is an amenable number.

7489 is a deficient number, since it is larger than the sum of its proper divisors (1).

7489 is an equidigital number, since it uses as much as digits as its factorization.

7489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 7489 is about 86.5390085453. The cubic root of 7489 is about 19.5647638471.

The spelling of 7489 in words is "seven thousand, four hundred eighty-nine".