618911 has 4 divisors (see below), whose sum is σ = 622872. Its totient is φ = 614952.

The previous prime is 618883. The next prime is 618913. The reversal of 618911 is 119816.

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 618911 - 2⁶ = 618847 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 (618913) 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, 1736 + ... + 2061.

It is an arithmetic number, because the mean of its divisors is an integer number (155718).

2⁶¹⁸⁹¹¹ is an apocalyptic number.

618911 is a deficient number, since it is larger than the sum of its proper divisors (3961).

618911 is a wasteful number, since it uses less digits than its factorization.

618911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960.

The product of its digits is 432, while the sum is 26.

The square root of 618911 is about 786.7089677892. The cubic root of 618911 is about 85.2202362536.

The spelling of 618911 in words is "six hundred eighteen thousand, nine hundred eleven".