8025428139 has 4 divisors (see below), whose sum is σ = 10700570856. Its totient is φ = 5350285424.

The previous prime is 8025428137. The next prime is 8025428171. The reversal of 8025428139 is 9318245208.

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 8025428139 - 2¹ = 8025428137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8025428139.

It is not an unprimeable number, because it can be changed into a prime (8025428137) 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, 1337571354 + ... + 1337571359.

It is an arithmetic number, because the mean of its divisors is an integer number (2675142714).

Almost surely, 2^8025428139 is an apocalyptic number.

8025428139 is a deficient number, since it is larger than the sum of its proper divisors (2675142717).

8025428139 is a wasteful number, since it uses less digits than its factorization.

8025428139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675142716.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 8025428139 is about 89584.7539428445. The cubic root of 8025428139 is about 2002.1167704344.

The spelling of 8025428139 in words is "eight billion, twenty-five million, four hundred twenty-eight thousand, one hundred thirty-nine".