188769481 has 2 divisors, whose sum is σ = 188769482. Its totient is φ = 188769480.

The previous prime is 188769467. The next prime is 188769491. The reversal of 188769481 is 184967881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144000000 + 44769481 = 12000^2 + 6691^2 .

It is a cyclic number.

It is not a de Polignac number, because 188769481 - 2²³ = 180380873 is a prime.

It is a super-2 number, since 2×188769481² = 71267833914018722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (188769431) 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, 94384740 + 94384741.

It is an arithmetic number, because the mean of its divisors is an integer number (94384741).

Almost surely, 2^188769481 is an apocalyptic number.

It is an amenable number.

188769481 is a deficient number, since it is larger than the sum of its proper divisors (1).

188769481 is an equidigital number, since it uses as much as digits as its factorization.

188769481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 52.

The square root of 188769481 is about 13739.3406319226. The cubic root of 188769481 is about 573.6459440465.

The spelling of 188769481 in words is "one hundred eighty-eight million, seven hundred sixty-nine thousand, four hundred eighty-one".