618779 has 4 divisors (see below), whose sum is σ = 707184. Its totient is φ = 530376.

The previous prime is 618719. The next prime is 618799. The reversal of 618779 is 977816.

It is a happy number.

618779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 618779 - 2¹² = 614683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44192 + ... + 44205.

It is an arithmetic number, because the mean of its divisors is an integer number (176796).

2⁶¹⁸⁷⁷⁹ is an apocalyptic number.

618779 is a deficient number, since it is larger than the sum of its proper divisors (88405).

618779 is an equidigital number, since it uses as much as digits as its factorization.

618779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88404.

The product of its digits is 21168, while the sum is 38.

The square root of 618779 is about 786.6250695217. The cubic root of 618779 is about 85.2141772935.

The spelling of 618779 in words is "six hundred eighteen thousand, seven hundred seventy-nine".