7139208049 has 4 divisors (see below), whose sum is σ = 7170383860. Its totient is φ = 7108032240.

The previous prime is 7139208031. The next prime is 7139208059. The reversal of 7139208049 is 9408029317.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5436407824 + 1702800225 = 73732^2 + 41265^2 .

It is a cyclic number.

It is not a de Polignac number, because 7139208049 - 2⁷ = 7139207921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7139207996 and 7139208014.

It is not an unprimeable number, because it can be changed into a prime (7139208059) 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, 15587562 + ... + 15588019.

It is an arithmetic number, because the mean of its divisors is an integer number (1792595965).

Almost surely, 2^7139208049 is an apocalyptic number.

It is an amenable number.

7139208049 is a deficient number, since it is larger than the sum of its proper divisors (31175811).

7139208049 is a wasteful number, since it uses less digits than its factorization.

7139208049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31175810.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 7139208049 is about 84493.8343845277. The cubic root of 7139208049 is about 1925.5287735226.

The spelling of 7139208049 in words is "seven billion, one hundred thirty-nine million, two hundred eight thousand, forty-nine".