148245509 has 2 divisors, whose sum is σ = 148245510. Its totient is φ = 148245508.

The previous prime is 148245499. The next prime is 148245521. The reversal of 148245509 is 905542841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148230625 + 14884 = 12175^2 + 122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148245509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148245529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74122754 + 74122755.

It is an arithmetic number, because the mean of its divisors is an integer number (74122755).

Almost surely, 2^148245509 is an apocalyptic number.

It is an amenable number.

148245509 is a deficient number, since it is larger than the sum of its proper divisors (1).

148245509 is an equidigital number, since it uses as much as digits as its factorization.

148245509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 148245509 is about 12175.6112372234. The cubic root of 148245509 is about 529.2495716455.

The spelling of 148245509 in words is "one hundred forty-eight million, two hundred forty-five thousand, five hundred nine".