188430481 has 2 divisors, whose sum is σ = 188430482. Its totient is φ = 188430480.

The previous prime is 188430461. The next prime is 188430503. The reversal of 188430481 is 184034881.

188430481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129754881 + 58675600 = 11391^2 + 7660^2 .

It is an emirp because it is prime and its reverse (184034881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188430481 is a prime.

It is a super-2 number, since 2×188430481² = 71012092339782722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 188430481.

It is not a weakly prime, because it can be changed into another prime (188430461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94215240 + 94215241.

It is an arithmetic number, because the mean of its divisors is an integer number (94215241).

Almost surely, 2^188430481 is an apocalyptic number.

It is an amenable number.

188430481 is a deficient number, since it is larger than the sum of its proper divisors (1).

188430481 is an equidigital number, since it uses as much as digits as its factorization.

188430481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 188430481 is about 13726.9982516208. The cubic root of 188430481 is about 573.3023459531.

The spelling of 188430481 in words is "one hundred eighty-eight million, four hundred thirty thousand, four hundred eighty-one".