148106209 has 2 divisors, whose sum is σ = 148106210. Its totient is φ = 148106208.

The previous prime is 148106207. The next prime is 148106237. The reversal of 148106209 is 902601841.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141491025 + 6615184 = 11895^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 148106209 - 2¹ = 148106207 is a prime.

Together with 148106207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (148106207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74053104 + 74053105.

It is an arithmetic number, because the mean of its divisors is an integer number (74053105).

Almost surely, 2^148106209 is an apocalyptic number.

It is an amenable number.

148106209 is a deficient number, since it is larger than the sum of its proper divisors (1).

148106209 is an equidigital number, since it uses as much as digits as its factorization.

148106209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 148106209 is about 12169.8894407468. The cubic root of 148106209 is about 529.0837485911.

The spelling of 148106209 in words is "one hundred forty-eight million, one hundred six thousand, two hundred nine".