7941839689 has 27 divisors (see below), whose sum is σ = 9589864167. Its totient is φ = 6557585328.

The previous prime is 7941839657. The next prime is 7941839699. The reversal of 7941839689 is 9869381497.

The square root of 7941839689 is 89117.

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

It can be written as a sum of positive squares in only one way, i.e., 4164508089 + 3777331600 = 64533^2 + 61460^2 .

It is not a de Polignac number, because 7941839689 - 2⁵ = 7941839657 is a prime.

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 7941839689.

It is not an unprimeable number, because it can be changed into a prime (7941839699) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18090532 + ... + 18090970.

Almost surely, 2^7941839689 is an apocalyptic number.

7941839689 is the 89117-th square number.

7941839689 is the 44559-th centered octagonal number.

It is an amenable number.

7941839689 is a deficient number, since it is larger than the sum of its proper divisors (1648024478).

7941839689 is an frugal number, since it uses more digits than its factorization.

7941839689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950 (or 475 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 64.

The cubic root of 7941839689 is about 1995.1415145331.

Multiplying 7941839689 by its sum of digits (64), we get a square (508277740096 = 712936²).

The spelling of 7941839689 in words is "seven billion, nine hundred forty-one million, eight hundred thirty-nine thousand, six hundred eighty-nine".