618871 has 8 divisors (see below), whose sum is σ = 681984. Its totient is φ = 556920.

The previous prime is 618869. The next prime is 618883. The reversal of 618871 is 178816.

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 618871 - 2¹ = 618869 is a prime.

It is a Duffinian number.

618871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618841) 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, 1176 + ... + 1618.

It is an arithmetic number, because the mean of its divisors is an integer number (85248).

2⁶¹⁸⁸⁷¹ is an apocalyptic number.

618871 is the 421-st centered heptagonal number.

618871 is a deficient number, since it is larger than the sum of its proper divisors (63113).

618871 is a wasteful number, since it uses less digits than its factorization.

618871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581.

The product of its digits is 2688, while the sum is 31.

The square root of 618871 is about 786.6835450167. The cubic root of 618871 is about 85.2184002960.

The spelling of 618871 in words is "six hundred eighteen thousand, eight hundred seventy-one".