7949389573 has 4 divisors (see below), whose sum is σ = 7951708588. Its totient is φ = 7947070560.

The previous prime is 7949389561. The next prime is 7949389619. The reversal of 7949389573 is 3759839497.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4779924769 + 3169464804 = 69137^2 + 56298^2 .

It is a cyclic number.

It is not a de Polignac number, because 7949389573 - 2²⁵ = 7915835141 is a prime.

It is a super-2 number, since 2×7949389573² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7949383573) 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, 1154358 + ... + 1161223.

It is an arithmetic number, because the mean of its divisors is an integer number (1987927147).

Almost surely, 2^7949389573 is an apocalyptic number.

It is an amenable number.

7949389573 is a deficient number, since it is larger than the sum of its proper divisors (2319015).

7949389573 is a wasteful number, since it uses less digits than its factorization.

7949389573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319014.

The product of its digits is 51438240, while the sum is 64.

The square root of 7949389573 is about 89159.3493302862. The cubic root of 7949389573 is about 1995.7735392227.

The spelling of 7949389573 in words is "seven billion, nine hundred forty-nine million, three hundred eighty-nine thousand, five hundred seventy-three".