83509343421 has 16 divisors (see below), whose sum is σ = 127535760000. Its totient is φ = 47613339648.

The previous prime is 83509343383. The next prime is 83509343447. The reversal of 83509343421 is 12434390538.

It is not a de Polignac number, because 83509343421 - 2¹¹ = 83509341373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83509343221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4418896 + ... + 4437753.

It is an arithmetic number, because the mean of its divisors is an integer number (7970985000).

Almost surely, 2^83509343421 is an apocalyptic number.

It is an amenable number.

83509343421 is a deficient number, since it is larger than the sum of its proper divisors (44026416579).

83509343421 is a wasteful number, since it uses less digits than its factorization.

83509343421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8857108.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 83509343421 in words is "eighty-three billion, five hundred nine million, three hundred forty-three thousand, four hundred twenty-one".