8819749 has 4 divisors (see below), whose sum is σ = 8857836. Its totient is φ = 8781664.

The previous prime is 8819737. The next prime is 8819761. The reversal of 8819749 is 9479188.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (8819737) and next prime (8819761).

It can be written as a sum of positive squares in 2 ways, for example, as 611524 + 8208225 = 782^2 + 2865^2 .

It is a cyclic number.

It is not a de Polignac number, because 8819749 - 2⁷ = 8819621 is a prime.

It is a Duffinian number.

8819749 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8819699 and 8819708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8819729) 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, 18694 + ... + 19159.

It is an arithmetic number, because the mean of its divisors is an integer number (2214459).

Almost surely, 2^8819749 is an apocalyptic number.

It is an amenable number.

8819749 is a deficient number, since it is larger than the sum of its proper divisors (38087).

8819749 is a wasteful number, since it uses less digits than its factorization.

8819749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38086.

The product of its digits is 145152, while the sum is 46.

The square root of 8819749 is about 2969.8062226347. The cubic root of 8819749 is about 206.6103508829.

The spelling of 8819749 in words is "eight million, eight hundred nineteen thousand, seven hundred forty-nine".