8618949 has 12 divisors (see below), whose sum is σ = 13182156. Its totient is φ = 5407872.

The previous prime is 8618933. The next prime is 8618959. The reversal of 8618949 is 9498168.

It can be written as a sum of positive squares in 2 ways, for example, as 2772225 + 5846724 = 1665^2 + 2418^2 .

It is not a de Polignac number, because 8618949 - 2⁴ = 8618933 is a prime.

8618949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8618959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28014 + ... + 28319.

It is an arithmetic number, because the mean of its divisors is an integer number (1098513).

Almost surely, 2^8618949 is an apocalyptic number.

It is an amenable number.

8618949 is a deficient number, since it is larger than the sum of its proper divisors (4563207).

8618949 is a wasteful number, since it uses less digits than its factorization.

8618949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56356 (or 56353 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 8618949 is about 2935.8046597143. The cubic root of 8618949 is about 205.0303266655.

The spelling of 8618949 in words is "eight million, six hundred eighteen thousand, nine hundred forty-nine".