618139113 has 4 divisors (see below), whose sum is σ = 824185488. Its totient is φ = 412092740.

The previous prime is 618139079. The next prime is 618139121. The reversal of 618139113 is 311931816.

It is a happy number.

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 cyclic number.

It is not a de Polignac number, because 618139113 - 2⁹ = 618138601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (618139183) 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, 103023183 + ... + 103023188.

It is an arithmetic number, because the mean of its divisors is an integer number (206046372).

Almost surely, 2^618139113 is an apocalyptic number.

It is an amenable number.

618139113 is a deficient number, since it is larger than the sum of its proper divisors (206046375).

618139113 is a wasteful number, since it uses less digits than its factorization.

618139113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206046374.

The product of its digits is 3888, while the sum is 33.

The square root of 618139113 is about 24862.4036046397. The cubic root of 618139113 is about 851.8479348505.

The spelling of 618139113 in words is "six hundred eighteen million, one hundred thirty-nine thousand, one hundred thirteen".