195012149 has 2 divisors, whose sum is σ = 195012150. Its totient is φ = 195012148.

The previous prime is 195012137. The next prime is 195012157. The reversal of 195012149 is 941210591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161163025 + 33849124 = 12695^2 + 5818^2 .

It is a cyclic number.

It is not a de Polignac number, because 195012149 - 2⁸ = 195011893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195012109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97506074 + 97506075.

It is an arithmetic number, because the mean of its divisors is an integer number (97506075).

Almost surely, 2^195012149 is an apocalyptic number.

It is an amenable number.

195012149 is a deficient number, since it is larger than the sum of its proper divisors (1).

195012149 is an equidigital number, since it uses as much as digits as its factorization.

195012149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 195012149 is about 13964.6750409739. The cubic root of 195012149 is about 579.9010423720.

The spelling of 195012149 in words is "one hundred ninety-five million, twelve thousand, one hundred forty-nine".