188680913 has 2 divisors, whose sum is σ = 188680914. Its totient is φ = 188680912.

The previous prime is 188680897. The next prime is 188680951. The reversal of 188680913 is 319086881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162996289 + 25684624 = 12767^2 + 5068^2 .

It is an emirp because it is prime and its reverse (319086881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188680913 - 2⁴ = 188680897 is a prime.

It is not a weakly prime, because it can be changed into another prime (188680213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94340456 + 94340457.

It is an arithmetic number, because the mean of its divisors is an integer number (94340457).

Almost surely, 2^188680913 is an apocalyptic number.

It is an amenable number.

188680913 is a deficient number, since it is larger than the sum of its proper divisors (1).

188680913 is an equidigital number, since it uses as much as digits as its factorization.

188680913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 188680913 is about 13736.1171005492. The cubic root of 188680913 is about 573.5562144608.

The spelling of 188680913 in words is "one hundred eighty-eight million, six hundred eighty thousand, nine hundred thirteen".