148564609 has 2 divisors, whose sum is σ = 148564610. Its totient is φ = 148564608.

The previous prime is 148564597. The next prime is 148564627. The reversal of 148564609 is 906465841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147088384 + 1476225 = 12128^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 148564609 - 2²⁵ = 115010177 is a prime.

It is not a weakly prime, because it can be changed into another prime (148564109) 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, 74282304 + 74282305.

It is an arithmetic number, because the mean of its divisors is an integer number (74282305).

Almost surely, 2^148564609 is an apocalyptic number.

It is an amenable number.

148564609 is a deficient number, since it is larger than the sum of its proper divisors (1).

148564609 is an equidigital number, since it uses as much as digits as its factorization.

148564609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 148564609 is about 12188.7082580559. The cubic root of 148564609 is about 529.6290379098.

The spelling of 148564609 in words is "one hundred forty-eight million, five hundred sixty-four thousand, six hundred nine".