618916919 has 4 divisors (see below), whose sum is σ = 629063160. Its totient is φ = 608770680.

The previous prime is 618916873. The next prime is 618916937. The reversal of 618916919 is 919619816.

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 618916919 - 2¹⁶ = 618851383 is a prime.

It is a super-2 number, since 2×618916919² = 766116305248905122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618916619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5073029 + ... + 5073150.

It is an arithmetic number, because the mean of its divisors is an integer number (157265790).

Almost surely, 2^618916919 is an apocalyptic number.

618916919 is a deficient number, since it is larger than the sum of its proper divisors (10146241).

618916919 is a wasteful number, since it uses less digits than its factorization.

618916919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10146240.

The product of its digits is 209952, while the sum is 50.

The square root of 618916919 is about 24878.0408995564. The cubic root of 618916919 is about 852.2050792265.

The spelling of 618916919 in words is "six hundred eighteen million, nine hundred sixteen thousand, nine hundred nineteen".