43600009993 has 2 divisors, whose sum is σ = 43600009994. Its totient is φ = 43600009992.

The previous prime is 43600009991. The next prime is 43600009997. The reversal of 43600009993 is 39990000634.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38201875209 + 5398134784 = 195453^2 + 73472^2 .

It is a cyclic number.

It is not a de Polignac number, because 43600009993 - 2¹ = 43600009991 is a prime.

Together with 43600009991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43600009991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21800004996 + 21800004997.

It is an arithmetic number, because the mean of its divisors is an integer number (21800004997).

Almost surely, 2^43600009993 is an apocalyptic number.

It is an amenable number.

43600009993 is a deficient number, since it is larger than the sum of its proper divisors (1).

43600009993 is an equidigital number, since it uses as much as digits as its factorization.

43600009993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 43.

The spelling of 43600009993 in words is "forty-three billion, six hundred million, nine thousand, nine hundred ninety-three".