8487749 has 6 divisors (see below), whose sum is σ = 8796690. Its totient is φ = 8179920.

The previous prime is 8487719. The next prime is 8487751. The reversal of 8487749 is 9477848.

It can be written as a sum of positive squares in 3 ways, for example, as 748225 + 7739524 = 865^2 + 2782^2 .

It is not a de Polignac number, because 8487749 - 2¹² = 8483653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8487719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15419 + ... + 15959.

It is an arithmetic number, because the mean of its divisors is an integer number (1466115).

Almost surely, 2^8487749 is an apocalyptic number.

It is an amenable number.

8487749 is a deficient number, since it is larger than the sum of its proper divisors (308941).

8487749 is an frugal number, since it uses more digits than its factorization.

8487749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111 (or 570 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 8487749 is about 2913.3741606598. The cubic root of 8487749 is about 203.9846601947.

Subtracting 8487749 from its reverse (9477848), we obtain a palindrome (990099).

The spelling of 8487749 in words is "eight million, four hundred eighty-seven thousand, seven hundred forty-nine".