148023209 has 2 divisors, whose sum is σ = 148023210. Its totient is φ = 148023208.

The previous prime is 148023191. The next prime is 148023217. The reversal of 148023209 is 902320841.

148023209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147865600 + 157609 = 12160^2 + 397^2 .

It is an emirp because it is prime and its reverse (902320841) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148023209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (148023229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74011604 + 74011605.

It is an arithmetic number, because the mean of its divisors is an integer number (74011605).

Almost surely, 2^148023209 is an apocalyptic number.

It is an amenable number.

148023209 is a deficient number, since it is larger than the sum of its proper divisors (1).

148023209 is an equidigital number, since it uses as much as digits as its factorization.

148023209 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 29.

The square root of 148023209 is about 12166.4789072270. The cubic root of 148023209 is about 528.9848957538.

The spelling of 148023209 in words is "one hundred forty-eight million, twenty-three thousand, two hundred nine".