188805061 has 2 divisors, whose sum is σ = 188805062. Its totient is φ = 188805060.

The previous prime is 188805047. The next prime is 188805073. The reversal of 188805061 is 160508881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187854436 + 950625 = 13706^2 + 975^2 .

It is a cyclic number.

It is not a de Polignac number, because 188805061 - 2²⁷ = 54587333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188805061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188805361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94402530 + 94402531.

It is an arithmetic number, because the mean of its divisors is an integer number (94402531).

Almost surely, 2^188805061 is an apocalyptic number.

It is an amenable number.

188805061 is a deficient number, since it is larger than the sum of its proper divisors (1).

188805061 is an equidigital number, since it uses as much as digits as its factorization.

188805061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 188805061 is about 13740.6353928776. The cubic root of 188805061 is about 573.6819827825.

The spelling of 188805061 in words is "one hundred eighty-eight million, eight hundred five thousand, sixty-one".