618874013 has 4 divisors (see below), whose sum is σ = 619224060. Its totient is φ = 618523968.

The previous prime is 618873971. The next prime is 618874019. The reversal of 618874013 is 310478816.

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

It can be written as a sum of positive squares in 2 ways, for example, as 519931204 + 98942809 = 22802^2 + 9947^2 .

It is a cyclic number.

It is not a de Polignac number, because 618874013 - 2²⁰ = 617825437 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 (618874019) 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, 172358 + ... + 175911.

It is an arithmetic number, because the mean of its divisors is an integer number (154806015).

Almost surely, 2^618874013 is an apocalyptic number.

It is an amenable number.

618874013 is a deficient number, since it is larger than the sum of its proper divisors (350047).

618874013 is a wasteful number, since it uses less digits than its factorization.

618874013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350046.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 618874013 is about 24877.1785578670. The cubic root of 618874013 is about 852.1853859230.

The spelling of 618874013 in words is "six hundred eighteen million, eight hundred seventy-four thousand, thirteen".