188133973 has 2 divisors, whose sum is σ = 188133974. Its totient is φ = 188133972.

The previous prime is 188133931. The next prime is 188133977. The reversal of 188133973 is 379331881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152349649 + 35784324 = 12343^2 + 5982^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188133973 is a prime.

It is a super-5 number, since 5×188133973⁵ (a number of 43 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188133977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94066986 + 94066987.

It is an arithmetic number, because the mean of its divisors is an integer number (94066987).

Almost surely, 2^188133973 is an apocalyptic number.

It is an amenable number.

188133973 is a deficient number, since it is larger than the sum of its proper divisors (1).

188133973 is an equidigital number, since it uses as much as digits as its factorization.

188133973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 188133973 is about 13716.1938233608. The cubic root of 188133973 is about 573.0014781883.

The spelling of 188133973 in words is "one hundred eighty-eight million, one hundred thirty-three thousand, nine hundred seventy-three".