8543983957 has 4 divisors (see below), whose sum is σ = 8546450380. Its totient is φ = 8541517536.

The previous prime is 8543983939. The next prime is 8543983961. The reversal of 8543983957 is 7593893458.

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 277355716 + 8266628241 = 16654^2 + 90921^2 .

It is a cyclic number.

It is not a de Polignac number, because 8543983957 - 2¹¹ = 8543981909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8543983895 and 8543983904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8543983937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1228008 + ... + 1234945.

It is an arithmetic number, because the mean of its divisors is an integer number (2136612595).

Almost surely, 2^8543983957 is an apocalyptic number.

It is an amenable number.

8543983957 is a deficient number, since it is larger than the sum of its proper divisors (2466423).

8543983957 is a wasteful number, since it uses less digits than its factorization.

8543983957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466422.

The product of its digits is 32659200, while the sum is 61.

The square root of 8543983957 is about 92433.6732852265. The cubic root of 8543983957 is about 2044.3416405648.

The spelling of 8543983957 in words is "eight billion, five hundred forty-three million, nine hundred eighty-three thousand, nine hundred fifty-seven".