83117488474639 has 2 divisors, whose sum is σ = 83117488474640. Its totient is φ = 83117488474638.

The previous prime is 83117488474627. The next prime is 83117488474661. The reversal of 83117488474639 is 93647488471138.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83117488474639 - 2²¹ = 83117486377487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83117488474609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41558744237319 + 41558744237320.

It is an arithmetic number, because the mean of its divisors is an integer number (41558744237320).

Almost surely, 2^{83117488474639} is an apocalyptic number.

83117488474639 is a deficient number, since it is larger than the sum of its proper divisors (1).

83117488474639 is an equidigital number, since it uses as much as digits as its factorization.

83117488474639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 780337152, while the sum is 73.

The spelling of 83117488474639 in words is "eighty-three trillion, one hundred seventeen billion, four hundred eighty-eight million, four hundred seventy-four thousand, six hundred thirty-nine".