618886213 has 4 divisors (see below), whose sum is σ = 675148608. Its totient is φ = 562623820.

The previous prime is 618886199. The next prime is 618886243. The reversal of 618886213 is 312688816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-618886213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 618886213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618886243) 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, 28131181 + ... + 28131202.

It is an arithmetic number, because the mean of its divisors is an integer number (168787152).

Almost surely, 2^618886213 is an apocalyptic number.

It is an amenable number.

618886213 is a deficient number, since it is larger than the sum of its proper divisors (56262395).

618886213 is a wasteful number, since it uses less digits than its factorization.

618886213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56262394.

The product of its digits is 110592, while the sum is 43.

The square root of 618886213 is about 24877.4237613142. The cubic root of 618886213 is about 852.1909856591.

The spelling of 618886213 in words is "six hundred eighteen million, eight hundred eighty-six thousand, two hundred thirteen".