187054393 has 2 divisors, whose sum is σ = 187054394. Its totient is φ = 187054392.

The previous prime is 187054381. The next prime is 187054433. The reversal of 187054393 is 393450781.

187054393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (187054433) can be obtained adding 187054393 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125148969 + 61905424 = 11187^2 + 7868^2 .

It is an emirp because it is prime and its reverse (393450781) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187054393 is a prime.

It is not a weakly prime, because it can be changed into another prime (187054303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93527196 + 93527197.

It is an arithmetic number, because the mean of its divisors is an integer number (93527197).

Almost surely, 2^187054393 is an apocalyptic number.

It is an amenable number.

187054393 is a deficient number, since it is larger than the sum of its proper divisors (1).

187054393 is an equidigital number, since it uses as much as digits as its factorization.

187054393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 187054393 is about 13676.7829916249. The cubic root of 187054393 is about 571.9033458951.

The spelling of 187054393 in words is "one hundred eighty-seven million, fifty-four thousand, three hundred ninety-three".