618949 has 4 divisors (see below), whose sum is σ = 623200. Its totient is φ = 614700.

The previous prime is 618941. The next prime is 618971. The reversal of 618949 is 949816.

618949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 618949 - 2³ = 618941 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

618949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618941) 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, 1899 + ... + 2200.

It is an arithmetic number, because the mean of its divisors is an integer number (155800).

2⁶¹⁸⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

618949 is a deficient number, since it is larger than the sum of its proper divisors (4251).

618949 is a wasteful number, since it uses less digits than its factorization.

618949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250.

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

The square root of 618949 is about 786.7331186622. The cubic root of 618949 is about 85.2219803399.

Adding to 618949 its product of digits (15552), we get a triangular number (634501 = T₁₁₂₆).

The spelling of 618949 in words is "six hundred eighteen thousand, nine hundred forty-nine".