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188133973 is a prime number
BaseRepresentation
bin10110011011010…
…11001001010101
3111010000012021221
423031223021111
5341130241343
630400210341
74443053356
oct1315531125
9433005257
10188133973
1197218925
12530099b1
132cc912a1
141adb3d2d
15117b35ed
hexb36b255

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 2k-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, 2188133973 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".