188345149 has 2 divisors, whose sum is σ = 188345150. Its totient is φ = 188345148.

The previous prime is 188345077. The next prime is 188345167. The reversal of 188345149 is 941543881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178623225 + 9721924 = 13365^2 + 3118^2 .

It is an emirp because it is prime and its reverse (941543881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188345149 - 2²³ = 179956541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188345249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94172574 + 94172575.

It is an arithmetic number, because the mean of its divisors is an integer number (94172575).

Almost surely, 2^188345149 is an apocalyptic number.

It is an amenable number.

188345149 is a deficient number, since it is larger than the sum of its proper divisors (1).

188345149 is an equidigital number, since it uses as much as digits as its factorization.

188345149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 43.

The square root of 188345149 is about 13723.8897182978. The cubic root of 188345149 is about 573.2157916226.

The spelling of 188345149 in words is "one hundred eighty-eight million, three hundred forty-five thousand, one hundred forty-nine".