7973239849 has 3 divisors (see below), whose sum is σ = 7973329143. Its totient is φ = 7973150556.

The previous prime is 7973239843. The next prime is 7973239871. The reversal of 7973239849 is 9489323797.

The square root of 7973239849 is 89293.

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 can be written as a sum of positive squares in only one way, i.e., 531072025 + 7442167824 = 23045^2 + 86268^2 .

It is not a de Polignac number, because 7973239849 - 2¹⁷ = 7973108777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7973239843) 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, 44647 + ... + 133939.

It is an arithmetic number, because the mean of its divisors is an integer number (2657776381).

Almost surely, 2^7973239849 is an apocalyptic number.

7973239849 is the 89293-rd square number.

7973239849 is the 44647-th centered octagonal number.

It is an amenable number.

7973239849 is a deficient number, since it is larger than the sum of its proper divisors (89294).

7973239849 is an frugal number, since it uses more digits than its factorization.

7973239849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178586 (or 89293 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 61.

The cubic root of 7973239849 is about 1997.7674963075.

The spelling of 7973239849 in words is "seven billion, nine hundred seventy-three million, two hundred thirty-nine thousand, eight hundred forty-nine".