185238149 has 2 divisors, whose sum is σ = 185238150. Its totient is φ = 185238148.

The previous prime is 185238121. The next prime is 185238161. The reversal of 185238149 is 941832581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139405249 + 45832900 = 11807^2 + 6770^2 .

It is an emirp because it is prime and its reverse (941832581) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185238149 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185238199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92619074 + 92619075.

It is an arithmetic number, because the mean of its divisors is an integer number (92619075).

Almost surely, 2^185238149 is an apocalyptic number.

It is an amenable number.

185238149 is a deficient number, since it is larger than the sum of its proper divisors (1).

185238149 is an equidigital number, since it uses as much as digits as its factorization.

185238149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 185238149 is about 13610.2222244899. Note that the first 5 decimals coincide. The cubic root of 185238149 is about 570.0463171555.

The spelling of 185238149 in words is "one hundred eighty-five million, two hundred thirty-eight thousand, one hundred forty-nine".