188964973 has 2 divisors, whose sum is σ = 188964974. Its totient is φ = 188964972.

The previous prime is 188964943. The next prime is 188965001. The reversal of 188964973 is 379469881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96766569 + 92198404 = 9837^2 + 9602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188964973 is a prime.

It is a super-2 number, since 2×188964973² = 71415522041781458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188964943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94482486 + 94482487.

It is an arithmetic number, because the mean of its divisors is an integer number (94482487).

Almost surely, 2^188964973 is an apocalyptic number.

It is an amenable number.

188964973 is a deficient number, since it is larger than the sum of its proper divisors (1).

188964973 is an equidigital number, since it uses as much as digits as its factorization.

188964973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The square root of 188964973 is about 13746.4531061652. The cubic root of 188964973 is about 573.8439006623.

The spelling of 188964973 in words is "one hundred eighty-eight million, nine hundred sixty-four thousand, nine hundred seventy-three".