148936309 has 2 divisors, whose sum is σ = 148936310. Its totient is φ = 148936308.

The previous prime is 148936273. The next prime is 148936331. The reversal of 148936309 is 903639841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140351409 + 8584900 = 11847^2 + 2930^2 .

It is a cyclic number.

It is not a de Polignac number, because 148936309 - 2⁹ = 148935797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148936349) 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, 74468154 + 74468155.

It is an arithmetic number, because the mean of its divisors is an integer number (74468155).

Almost surely, 2^148936309 is an apocalyptic number.

It is an amenable number.

148936309 is a deficient number, since it is larger than the sum of its proper divisors (1).

148936309 is an equidigital number, since it uses as much as digits as its factorization.

148936309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 148936309 is about 12203.9464518655. The cubic root of 148936309 is about 530.0703703880.

The spelling of 148936309 in words is "one hundred forty-eight million, nine hundred thirty-six thousand, three hundred nine".