618247 has 4 divisors (see below), whose sum is σ = 706576. Its totient is φ = 529920.

The previous prime is 618229. The next prime is 618253. The reversal of 618247 is 742816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 618247 - 2⁷ = 618119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44154 + ... + 44167.

It is an arithmetic number, because the mean of its divisors is an integer number (176644).

2⁶¹⁸²⁴⁷ is an apocalyptic number.

618247 is a deficient number, since it is larger than the sum of its proper divisors (88329).

618247 is an equidigital number, since it uses as much as digits as its factorization.

618247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88328.

The product of its digits is 2688, while the sum is 28.

The square root of 618247 is about 786.2868433339. The cubic root of 618247 is about 85.1897491102.

The spelling of 618247 in words is "six hundred eighteen thousand, two hundred forty-seven".