188085481 has 2 divisors, whose sum is σ = 188085482. Its totient is φ = 188085480.

The previous prime is 188085473. The next prime is 188085589. The reversal of 188085481 is 184580881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171610000 + 16475481 = 13100^2 + 4059^2 .

It is a cyclic number.

It is not a de Polignac number, because 188085481 - 2³ = 188085473 is a prime.

It is a super-2 number, since 2×188085481² = 70752296326002722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (188082481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94042740 + 94042741.

It is an arithmetic number, because the mean of its divisors is an integer number (94042741).

Almost surely, 2^188085481 is an apocalyptic number.

It is an amenable number.

188085481 is a deficient number, since it is larger than the sum of its proper divisors (1).

188085481 is an equidigital number, since it uses as much as digits as its factorization.

188085481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81920, while the sum is 43.

The square root of 188085481 is about 13714.4260178835. The cubic root of 188085481 is about 572.9522431053.

The spelling of 188085481 in words is "one hundred eighty-eight million, eighty-five thousand, four hundred eighty-one".