83840108531 has 2 divisors, whose sum is σ = 83840108532. Its totient is φ = 83840108530.

The previous prime is 83840108509. The next prime is 83840108543. The reversal of 83840108531 is 13580104838.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83840108531 is a prime.

It is a super-2 number, since 2×83840108531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83840108591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41920054265 + 41920054266.

It is an arithmetic number, because the mean of its divisors is an integer number (41920054266).

Almost surely, 2^83840108531 is an apocalyptic number.

83840108531 is a deficient number, since it is larger than the sum of its proper divisors (1).

83840108531 is an equidigital number, since it uses as much as digits as its factorization.

83840108531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 83840108531 in words is "eighty-three billion, eight hundred forty million, one hundred eight thousand, five hundred thirty-one".