7568139 has 4 divisors (see below), whose sum is σ = 10090856. Its totient is φ = 5045424.

The previous prime is 7568089. The next prime is 7568161. The reversal of 7568139 is 9318657.

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

It is not a de Polignac number, because 7568139 - 2⁸ = 7567883 is a prime.

It is a Duffinian number.

7568139 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7568097 and 7568106.

It is not an unprimeable number, because it can be changed into a prime (7568039) 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, 1261354 + ... + 1261359.

It is an arithmetic number, because the mean of its divisors is an integer number (2522714).

Almost surely, 2^7568139 is an apocalyptic number.

7568139 is a deficient number, since it is larger than the sum of its proper divisors (2522717).

7568139 is a wasteful number, since it uses less digits than its factorization.

7568139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522716.

The product of its digits is 45360, while the sum is 39.

The square root of 7568139 is about 2751.0250816741. The cubic root of 7568139 is about 196.3343851201.

The spelling of 7568139 in words is "seven million, five hundred sixty-eight thousand, one hundred thirty-nine".