84917830111391 has 2 divisors, whose sum is σ = 84917830111392. Its totient is φ = 84917830111390.

The previous prime is 84917830111369. The next prime is 84917830111441. The reversal of 84917830111391 is 19311103871948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84917830111391 - 2⁶ = 84917830111327 is a prime.

It is a super-2 number, since 2×84917830111391² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84917830114391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42458915055695 + 42458915055696.

It is an arithmetic number, because the mean of its divisors is an integer number (42458915055696).

Almost surely, 2^{84917830111391} is an apocalyptic number.

84917830111391 is a deficient number, since it is larger than the sum of its proper divisors (1).

84917830111391 is an equidigital number, since it uses as much as digits as its factorization.

84917830111391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 56.

The spelling of 84917830111391 in words is "eighty-four trillion, nine hundred seventeen billion, eight hundred thirty million, one hundred eleven thousand, three hundred ninety-one".