8749939 has 4 divisors (see below), whose sum is σ = 9545400. Its totient is φ = 7954480.

The previous prime is 8749927. The next prime is 8749981. The reversal of 8749939 is 9399478.

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

It is a cyclic number.

It is not a de Polignac number, because 8749939 - 2¹¹ = 8747891 is a prime.

It is a super-2 number, since 2×8749939² = 153122865007442, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8749892 and 8749901.

It is not an unprimeable number, because it can be changed into a prime (8749439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397714 + ... + 397735.

It is an arithmetic number, because the mean of its divisors is an integer number (2386350).

Almost surely, 2^8749939 is an apocalyptic number.

8749939 is a deficient number, since it is larger than the sum of its proper divisors (795461).

8749939 is a wasteful number, since it uses less digits than its factorization.

8749939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795460.

The product of its digits is 489888, while the sum is 49.

The square root of 8749939 is about 2958.0295806499. The cubic root of 8749939 is about 206.0637861352.

It can be divided in two parts, 8 and 749939, that added together give a palindrome (749947).

The spelling of 8749939 in words is "eight million, seven hundred forty-nine thousand, nine hundred thirty-nine".