618994 has 8 divisors (see below), whose sum is σ = 934380. Its totient is φ = 307536.

The previous prime is 618991. The next prime is 618997. The reversal of 618994 is 499816.

It is an interprime number because it is at equal distance from previous prime (618991) and next prime (618997).

It can be written as a sum of positive squares in 2 ways, for example, as 469225 + 149769 = 685^2 + 387^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (618991) 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 3 ways as a sum of consecutive naturals, for example, 549 + ... + 1240.

2⁶¹⁸⁹⁹⁴ is an apocalyptic number.

618994 is a deficient number, since it is larger than the sum of its proper divisors (315386).

618994 is a wasteful number, since it uses less digits than its factorization.

618994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964.

The product of its digits is 15552, while the sum is 37.

The square root of 618994 is about 786.7617174215. The cubic root of 618994 is about 85.2240456130.

The spelling of 618994 in words is "six hundred eighteen thousand, nine hundred ninety-four".