186001481 has 2 divisors, whose sum is σ = 186001482. Its totient is φ = 186001480.

The previous prime is 186001441. The next prime is 186001489. The reversal of 186001481 is 184100681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184416400 + 1585081 = 13580^2 + 1259^2 .

It is an emirp because it is prime and its reverse (184100681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 186001481 - 2¹⁰ = 186000457 is a prime.

It is a super-2 number, since 2×186001481² = 69193101868386722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (186001489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93000740 + 93000741.

It is an arithmetic number, because the mean of its divisors is an integer number (93000741).

Almost surely, 2^186001481 is an apocalyptic number.

It is an amenable number.

186001481 is a deficient number, since it is larger than the sum of its proper divisors (1).

186001481 is an equidigital number, since it uses as much as digits as its factorization.

186001481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 186001481 is about 13638.2359929721. The cubic root of 186001481 is about 570.8282623782.

The spelling of 186001481 in words is "one hundred eighty-six million, one thousand, four hundred eighty-one".