6869525139 has 8 divisors (see below), whose sum is σ = 10177074320. Its totient is φ = 4579683408.

The previous prime is 6869525081. The next prime is 6869525141. The reversal of 6869525139 is 9315259686.

It is a happy number.

6869525139 is a `hidden beast` number, since 6 + 86 + 9 + 525 + 1 + 39 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-6869525139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6869525239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127213402 + ... + 127213455.

It is an arithmetic number, because the mean of its divisors is an integer number (1272134290).

Almost surely, 2^6869525139 is an apocalyptic number.

6869525139 is a deficient number, since it is larger than the sum of its proper divisors (3307549181).

6869525139 is a wasteful number, since it uses less digits than its factorization.

6869525139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254426866 (or 254426860 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 6869525139 is about 82882.5985294863. The cubic root of 6869525139 is about 1900.9713536449.

The spelling of 6869525139 in words is "six billion, eight hundred sixty-nine million, five hundred twenty-five thousand, one hundred thirty-nine".