187242593 has 2 divisors, whose sum is σ = 187242594. Its totient is φ = 187242592.

The previous prime is 187242569. The next prime is 187242631. The reversal of 187242593 is 395242781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124389409 + 62853184 = 11153^2 + 7928^2 .

It is a cyclic number.

It is not a de Polignac number, because 187242593 - 2⁸ = 187242337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 187242593.

It is not a weakly prime, because it can be changed into another prime (187202593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93621296 + 93621297.

It is an arithmetic number, because the mean of its divisors is an integer number (93621297).

Almost surely, 2^187242593 is an apocalyptic number.

It is an amenable number.

187242593 is a deficient number, since it is larger than the sum of its proper divisors (1).

187242593 is an equidigital number, since it uses as much as digits as its factorization.

187242593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 187242593 is about 13683.6615348378. The cubic root of 187242593 is about 572.0950835870.

The spelling of 187242593 in words is "one hundred eighty-seven million, two hundred forty-two thousand, five hundred ninety-three".