7138447441 has 4 divisors (see below), whose sum is σ = 7558356132. Its totient is φ = 6718538752.

The previous prime is 7138447439. The next prime is 7138447471. The reversal of 7138447441 is 1447448317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1447448317 = 7 ⋅206778331.

It can be written as a sum of positive squares in 2 ways, for example, as 5432427025 + 1706020416 = 73705^2 + 41304^2 .

It is a cyclic number.

It is not a de Polignac number, because 7138447441 - 2¹ = 7138447439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7138447471) 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, 209954320 + ... + 209954353.

It is an arithmetic number, because the mean of its divisors is an integer number (1889589033).

Almost surely, 2^7138447441 is an apocalyptic number.

It is an amenable number.

7138447441 is a deficient number, since it is larger than the sum of its proper divisors (419908691).

7138447441 is a wasteful number, since it uses less digits than its factorization.

7138447441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419908690.

The product of its digits is 301056, while the sum is 43.

The square root of 7138447441 is about 84489.3332971683. Note that the first 3 decimals coincide. The cubic root of 7138447441 is about 1925.4603894388.

The spelling of 7138447441 in words is "seven billion, one hundred thirty-eight million, four hundred forty-seven thousand, four hundred forty-one".