83509343447 has 2 divisors, whose sum is σ = 83509343448. Its totient is φ = 83509343446.

The previous prime is 83509343383. The next prime is 83509343453. The reversal of 83509343447 is 74434390538.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83509343447 - 2⁶ = 83509343383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83509343395 and 83509343404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83509342447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41754671723 + 41754671724.

It is an arithmetic number, because the mean of its divisors is an integer number (41754671724).

Almost surely, 2^83509343447 is an apocalyptic number.

83509343447 is a deficient number, since it is larger than the sum of its proper divisors (1).

83509343447 is an equidigital number, since it uses as much as digits as its factorization.

83509343447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 83509343447 in words is "eighty-three billion, five hundred nine million, three hundred forty-three thousand, four hundred forty-seven".