83653438909 has 2 divisors, whose sum is σ = 83653438910. Its totient is φ = 83653438908.

The previous prime is 83653438907. The next prime is 83653438919. The reversal of 83653438909 is 90983435638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79635146809 + 4018292100 = 282197^2 + 63390^2 .

It is a cyclic number.

It is not a de Polignac number, because 83653438909 - 2¹ = 83653438907 is a prime.

It is a super-2 number, since 2×83653438909² (a number of 23 digits) contains 22 as substring.

Together with 83653438907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83653438903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41826719454 + 41826719455.

It is an arithmetic number, because the mean of its divisors is an integer number (41826719455).

Almost surely, 2^83653438909 is an apocalyptic number.

It is an amenable number.

83653438909 is a deficient number, since it is larger than the sum of its proper divisors (1).

83653438909 is an equidigital number, since it uses as much as digits as its factorization.

83653438909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 83653438909 in words is "eighty-three billion, six hundred fifty-three million, four hundred thirty-eight thousand, nine hundred nine".