8543326397 has 4 divisors (see below), whose sum is σ = 8562354300. Its totient is φ = 8524298496.

The previous prime is 8543326303. The next prime is 8543326399. The reversal of 8543326397 is 7936233458.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7936233458 = 2 ⋅3968116729.

It can be written as a sum of positive squares in 2 ways, for example, as 7124372836 + 1418953561 = 84406^2 + 37669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8543326397 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 (8543326399) 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, 9513278 + ... + 9514175.

It is an arithmetic number, because the mean of its divisors is an integer number (2140588575).

Almost surely, 2^8543326397 is an apocalyptic number.

It is an amenable number.

8543326397 is a deficient number, since it is larger than the sum of its proper divisors (19027903).

8543326397 is a wasteful number, since it uses less digits than its factorization.

8543326397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19027902.

The product of its digits is 3265920, while the sum is 50.

The square root of 8543326397 is about 92430.1162879286. The cubic root of 8543326397 is about 2044.2891938458.

The spelling of 8543326397 in words is "eight billion, five hundred forty-three million, three hundred twenty-six thousand, three hundred ninety-seven".