8681949 has 6 divisors (see below), whose sum is σ = 12540606. Its totient is φ = 5787960.

The previous prime is 8681941. The next prime is 8681957. The reversal of 8681949 is 9491868.

It is an interprime number because it is at equal distance from previous prime (8681941) and next prime (8681957).

It can be written as a sum of positive squares in only one way, i.e., 4347225 + 4334724 = 2085^2 + 2082^2 .

It is not a de Polignac number, because 8681949 - 2³ = 8681941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8681941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 482322 + ... + 482339.

It is an arithmetic number, because the mean of its divisors is an integer number (2090101).

Almost surely, 2^8681949 is an apocalyptic number.

It is an amenable number.

8681949 is a deficient number, since it is larger than the sum of its proper divisors (3858657).

8681949 is a wasteful number, since it uses less digits than its factorization.

8681949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964667 (or 964664 counting only the distinct ones).

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

The square root of 8681949 is about 2946.5147208185. The cubic root of 8681949 is about 205.5286691669.

It can be divided in two parts, 86819 and 49, that added together give a palindrome (86868).

The spelling of 8681949 in words is "eight million, six hundred eighty-one thousand, nine hundred forty-nine".