6438297121 has 3 divisors (see below), whose sum is σ = 6438377361. Its totient is φ = 6438216882.

The previous prime is 6438297119. The next prime is 6438297133. The reversal of 6438297121 is 1217928346.

The square root of 6438297121 is 80239.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1217928346 = 2 ⋅608964173.

It is not a de Polignac number, because 6438297121 - 2¹ = 6438297119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6438297181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 40120 + ... + 120358.

It is an arithmetic number, because the mean of its divisors is an integer number (2146125787).

Almost surely, 2^6438297121 is an apocalyptic number.

6438297121 is the 80239-th square number.

6438297121 is the 40120-th centered octagonal number.

It is an amenable number.

6438297121 is a deficient number, since it is larger than the sum of its proper divisors (80240).

6438297121 is an frugal number, since it uses more digits than its factorization.

6438297121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160478 (or 80239 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The cubic root of 6438297121 is about 1860.3314937939.

The spelling of 6438297121 in words is "six billion, four hundred thirty-eight million, two hundred ninety-seven thousand, one hundred twenty-one".