618919 has 12 divisors (see below), whose sum is σ = 763344. Its totient is φ = 498624.

The previous prime is 618913. The next prime is 618929. The reversal of 618919 is 919816.

It is not a de Polignac number, because 618919 - 2⁹ = 618407 is a prime.

It is a super-2 number, since 2×618919² = 766121457122, 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 (618913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 462 + ... + 1204.

It is an arithmetic number, because the mean of its divisors is an integer number (63612).

2⁶¹⁸⁹¹⁹ is an apocalyptic number.

618919 is a deficient number, since it is larger than the sum of its proper divisors (144425).

618919 is a wasteful number, since it uses less digits than its factorization.

618919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 767 counting only the distinct ones).

The product of its digits is 3888, while the sum is 34.

The square root of 618919 is about 786.7140522452. The cubic root of 618919 is about 85.2206034356.

The spelling of 618919 in words is "six hundred eighteen thousand, nine hundred nineteen".