188900317 has 2 divisors, whose sum is σ = 188900318. Its totient is φ = 188900316.

The previous prime is 188900293. The next prime is 188900339. The reversal of 188900317 is 713009881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145419481 + 43480836 = 12059^2 + 6594^2 .

It is a cyclic number.

It is not a de Polignac number, because 188900317 - 2⁷ = 188900189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188900377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94450158 + 94450159.

It is an arithmetic number, because the mean of its divisors is an integer number (94450159).

Almost surely, 2^188900317 is an apocalyptic number.

It is an amenable number.

188900317 is a deficient number, since it is larger than the sum of its proper divisors (1).

188900317 is an equidigital number, since it uses as much as digits as its factorization.

188900317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 188900317 is about 13744.1011710479. The cubic root of 188900317 is about 573.7784446449.

The spelling of 188900317 in words is "one hundred eighty-eight million, nine hundred thousand, three hundred seventeen".