7839143223409 has 3 divisors (see below), whose sum is σ = 7839146023257. Its totient is φ = 7839140423562.

The previous prime is 7839143223383. The next prime is 7839143223433. The reversal of 7839143223409 is 9043223419387.

The square root of 7839143223409 is 2799847.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 7839143223409 - 2⁵ = 7839143223377 is a prime.

It is a super-2 number, since 2×7839143223409² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7839143223409.

It is not an unprimeable number, because it can be changed into a prime (7839143223479) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1399924 + ... + 4199770.

It is an arithmetic number, because the mean of its divisors is an integer number (2613048674419).

Almost surely, 2^{7839143223409} is an apocalyptic number.

7839143223409 is the 2799847-th square number.

7839143223409 is the 1399924-th centered octagonal number.

It is an amenable number.

7839143223409 is a deficient number, since it is larger than the sum of its proper divisors (2799848).

7839143223409 is an frugal number, since it uses more digits than its factorization.

7839143223409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599694 (or 2799847 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 55.

The spelling of 7839143223409 in words is "seven trillion, eight hundred thirty-nine billion, one hundred forty-three million, two hundred twenty-three thousand, four hundred nine".