247489 has 8 divisors (see below), whose sum is σ = 273600. Its totient is φ = 222000.

The previous prime is 247463. The next prime is 247501. The reversal of 247489 is 984742.

It is a happy number.

247489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 247489 - 2¹³ = 239297 is a prime.

It is a super-2 number, since 2×247489² = 122501610242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1564 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (34200).

2²⁴⁷⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

247489 is a deficient number, since it is larger than the sum of its proper divisors (26111).

247489 is a wasteful number, since it uses less digits than its factorization.

247489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its digits is 16128, while the sum is 34.

The square root of 247489 is about 497.4826630145. The cubic root of 247489 is about 62.7844316149.

Subtracting from 247489 its product of digits (16128), we obtain a square (231361 = 481²).

The spelling of 247489 in words is "two hundred forty-seven thousand, four hundred eighty-nine".