188470561 has 2 divisors, whose sum is σ = 188470562. Its totient is φ = 188470560.

The previous prime is 188470501. The next prime is 188470571. The reversal of 188470561 is 165074881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162409536 + 26061025 = 12744^2 + 5105^2 .

It is an emirp because it is prime and its reverse (165074881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188470561 - 2¹³ = 188462369 is a prime.

It is not a weakly prime, because it can be changed into another prime (188470501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94235280 + 94235281.

It is an arithmetic number, because the mean of its divisors is an integer number (94235281).

Almost surely, 2^188470561 is an apocalyptic number.

It is an amenable number.

188470561 is a deficient number, since it is larger than the sum of its proper divisors (1).

188470561 is an equidigital number, since it uses as much as digits as its factorization.

188470561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 188470561 is about 13728.4580707376. The cubic root of 188470561 is about 573.3429910563.

The spelling of 188470561 in words is "one hundred eighty-eight million, four hundred seventy thousand, five hundred sixty-one".