8249949 has 24 divisors (see below), whose sum is σ = 12525240. Its totient is φ = 5225472.

The previous prime is 8249921. The next prime is 8249977. The reversal of 8249949 is 9499428.

It is an interprime number because it is at equal distance from previous prime (8249921) and next prime (8249977).

It can be written as a sum of positive squares in 4 ways, for example, as 381924 + 7868025 = 618^2 + 2805^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8249949 is a prime.

It is an Ulam number.

8249949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8249909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18837 + ... + 19269.

It is an arithmetic number, because the mean of its divisors is an integer number (521885).

Almost surely, 2^8249949 is an apocalyptic number.

It is an amenable number.

8249949 is a deficient number, since it is larger than the sum of its proper divisors (4275291).

8249949 is a wasteful number, since it uses less digits than its factorization.

8249949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 538 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 8249949 is about 2872.2724452948. The cubic root of 8249949 is about 202.0615846601.

The spelling of 8249949 in words is "eight million, two hundred forty-nine thousand, nine hundred forty-nine".