84843389531 has 2 divisors, whose sum is σ = 84843389532. Its totient is φ = 84843389530.

The previous prime is 84843389503. The next prime is 84843389537. The reversal of 84843389531 is 13598334848.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84843389531 - 2²² = 84839195227 is a prime.

It is a super-2 number, since 2×84843389531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84843389537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42421694765 + 42421694766.

It is an arithmetic number, because the mean of its divisors is an integer number (42421694766).

Almost surely, 2^84843389531 is an apocalyptic number.

84843389531 is a deficient number, since it is larger than the sum of its proper divisors (1).

84843389531 is an equidigital number, since it uses as much as digits as its factorization.

84843389531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 56.

The spelling of 84843389531 in words is "eighty-four billion, eight hundred forty-three million, three hundred eighty-nine thousand, five hundred thirty-one".