7945404769 has 3 divisors (see below), whose sum is σ = 7945493907. Its totient is φ = 7945315632.

The previous prime is 7945404751. The next prime is 7945404791. The reversal of 7945404769 is 9674045497.

The square root of 7945404769 is 89137.

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

7945404769 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 can be written as a sum of positive squares in only one way, i.e., 7412349025 + 533055744 = 86095^2 + 23088^2 .

It is not a de Polignac number, because 7945404769 - 2²⁹ = 7408533857 is a prime.

It is a super-2 number, since 2×7945404769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7945404569) 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, 44569 + ... + 133705.

It is an arithmetic number, because the mean of its divisors is an integer number (2648497969).

Almost surely, 2^7945404769 is an apocalyptic number.

7945404769 is the 89137-th square number.

7945404769 is the 44569-th centered octagonal number.

It is an amenable number.

7945404769 is a deficient number, since it is larger than the sum of its proper divisors (89138).

7945404769 is an frugal number, since it uses more digits than its factorization.

7945404769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178274 (or 89137 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 55.

The cubic root of 7945404769 is about 1995.4400085572.

The spelling of 7945404769 in words is "seven billion, nine hundred forty-five million, four hundred four thousand, seven hundred sixty-nine".