8749139 has 16 divisors (see below), whose sum is σ = 10617600. Its totient is φ = 7042464.

The previous prime is 8749133. The next prime is 8749141. The reversal of 8749139 is 9319478.

It is a happy number.

It is not a de Polignac number, because 8749139 - 2¹⁶ = 8683603 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8749096 and 8749105.

It is not an unprimeable number, because it can be changed into a prime (8749133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20672 + ... + 21090.

It is an arithmetic number, because the mean of its divisors is an integer number (663600).

Almost surely, 2^8749139 is an apocalyptic number.

8749139 is a deficient number, since it is larger than the sum of its proper divisors (1868461).

8749139 is a wasteful number, since it uses less digits than its factorization.

8749139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602.

The product of its digits is 54432, while the sum is 41.

The square root of 8749139 is about 2957.8943524068. The cubic root of 8749139 is about 206.0575058608.

It can be divided in two parts, 8749 and 139, that added together give a palindrome (8888).

The spelling of 8749139 in words is "eight million, seven hundred forty-nine thousand, one hundred thirty-nine".