188045317 has 2 divisors, whose sum is σ = 188045318. Its totient is φ = 188045316.

The previous prime is 188045281. The next prime is 188045327. The reversal of 188045317 is 713540881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156975841 + 31069476 = 12529^2 + 5574^2 .

It is a cyclic number.

It is not a de Polignac number, because 188045317 - 2¹¹ = 188043269 is a prime.

It is a super-2 number, since 2×188045317² = 70722082491260978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188045327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94022658 + 94022659.

It is an arithmetic number, because the mean of its divisors is an integer number (94022659).

Almost surely, 2^188045317 is an apocalyptic number.

It is an amenable number.

188045317 is a deficient number, since it is larger than the sum of its proper divisors (1).

188045317 is an equidigital number, since it uses as much as digits as its factorization.

188045317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 188045317 is about 13712.9616421836. The cubic root of 188045317 is about 572.9114572315.

The spelling of 188045317 in words is "one hundred eighty-eight million, forty-five thousand, three hundred seventeen".