6424879397 has 4 divisors (see below), whose sum is σ = 6457493196. Its totient is φ = 6392265600.

The previous prime is 6424879387. The next prime is 6424879403. The reversal of 6424879397 is 7939784246.

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 4230331681 + 2194547716 = 65041^2 + 46846^2 .

It is a cyclic number.

It is not a de Polignac number, because 6424879397 - 2¹⁰ = 6424878373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6424879387) 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, 16306604 + ... + 16306997.

It is an arithmetic number, because the mean of its divisors is an integer number (1614373299).

Almost surely, 2^6424879397 is an apocalyptic number.

It is an amenable number.

6424879397 is a deficient number, since it is larger than the sum of its proper divisors (32613799).

6424879397 is a wasteful number, since it uses less digits than its factorization.

6424879397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32613798.

The product of its digits is 18289152, while the sum is 59.

The square root of 6424879397 is about 80155.3454050321. The cubic root of 6424879397 is about 1859.0382545810.

The spelling of 6424879397 in words is "six billion, four hundred twenty-four million, eight hundred seventy-nine thousand, three hundred ninety-seven".