148775509 has 2 divisors, whose sum is σ = 148775510. Its totient is φ = 148775508.

The previous prime is 148775503. The next prime is 148775527. The reversal of 148775509 is 905577841.

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., 114961284 + 33814225 = 10722^2 + 5815^2 .

It is a cyclic number.

It is not a de Polignac number, because 148775509 - 2¹³ = 148767317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148775503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74387754 + 74387755.

It is an arithmetic number, because the mean of its divisors is an integer number (74387755).

Almost surely, 2^148775509 is an apocalyptic number.

It is an amenable number.

148775509 is a deficient number, since it is larger than the sum of its proper divisors (1).

148775509 is an equidigital number, since it uses as much as digits as its factorization.

148775509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 148775509 is about 12197.3566398626. The cubic root of 148775509 is about 529.8795371173.

The spelling of 148775509 in words is "one hundred forty-eight million, seven hundred seventy-five thousand, five hundred nine".