7138718239 has 4 divisors (see below), whose sum is σ = 7312833360. Its totient is φ = 6964603120.

The previous prime is 7138718189. The next prime is 7138718243. The reversal of 7138718239 is 9328178317.

It is a happy number.

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 7138718239 - 2¹⁷ = 7138587167 is a prime.

It is a super-2 number, since 2×7138718239² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7138718192 and 7138718201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138718269) 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, 87057499 + ... + 87057580.

It is an arithmetic number, because the mean of its divisors is an integer number (1828208340).

Almost surely, 2^7138718239 is an apocalyptic number.

7138718239 is a deficient number, since it is larger than the sum of its proper divisors (174115121).

7138718239 is a wasteful number, since it uses less digits than its factorization.

7138718239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174115120.

The product of its digits is 508032, while the sum is 49.

The square root of 7138718239 is about 84490.9358392958. The cubic root of 7138718239 is about 1925.4847366671.

The spelling of 7138718239 in words is "seven billion, one hundred thirty-eight million, seven hundred eighteen thousand, two hundred thirty-nine".