188875913 has 2 divisors, whose sum is σ = 188875914. Its totient is φ = 188875912.

The previous prime is 188875859. The next prime is 188875937. The reversal of 188875913 is 319578881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100741369 + 88134544 = 10037^2 + 9388^2 .

It is a cyclic number.

It is not a de Polignac number, because 188875913 - 2¹² = 188871817 is a prime.

It is a super-2 number, since 2×188875913² = 71348221023167138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (188875513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94437956 + 94437957.

It is an arithmetic number, because the mean of its divisors is an integer number (94437957).

Almost surely, 2^188875913 is an apocalyptic number.

It is an amenable number.

188875913 is a deficient number, since it is larger than the sum of its proper divisors (1).

188875913 is an equidigital number, since it uses as much as digits as its factorization.

188875913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 50.

The square root of 188875913 is about 13743.2133433197. The cubic root of 188875913 is about 573.7537348007.

The spelling of 188875913 in words is "one hundred eighty-eight million, eight hundred seventy-five thousand, nine hundred thirteen".