188973493 has 2 divisors, whose sum is σ = 188973494. Its totient is φ = 188973492.

The previous prime is 188973481. The next prime is 188973503. The reversal of 188973493 is 394379881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188705169 + 268324 = 13737^2 + 518^2 .

It is a cyclic number.

It is not a de Polignac number, because 188973493 - 2⁹ = 188972981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188973493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188973413) 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, 94486746 + 94486747.

It is an arithmetic number, because the mean of its divisors is an integer number (94486747).

Almost surely, 2^188973493 is an apocalyptic number.

It is an amenable number.

188973493 is a deficient number, since it is larger than the sum of its proper divisors (1).

188973493 is an equidigital number, since it uses as much as digits as its factorization.

188973493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 188973493 is about 13746.7630007940. The cubic root of 188973493 is about 573.8525249706.

The spelling of 188973493 in words is "one hundred eighty-eight million, nine hundred seventy-three thousand, four hundred ninety-three".