154748449 has 2 divisors, whose sum is σ = 154748450. Its totient is φ = 154748448.

The previous prime is 154748441. The next prime is 154748459. The reversal of 154748449 is 944847451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153140625 + 1607824 = 12375^2 + 1268^2 .

It is a cyclic number.

It is not a de Polignac number, because 154748449 - 2³ = 154748441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 154748399 and 154748408.

It is not a weakly prime, because it can be changed into another prime (154748441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77374224 + 77374225.

It is an arithmetic number, because the mean of its divisors is an integer number (77374225).

Almost surely, 2^154748449 is an apocalyptic number.

It is an amenable number.

154748449 is a deficient number, since it is larger than the sum of its proper divisors (1).

154748449 is an equidigital number, since it uses as much as digits as its factorization.

154748449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 46.

The square root of 154748449 is about 12439.7929645151. The cubic root of 154748449 is about 536.8777861462.

The spelling of 154748449 in words is "one hundred fifty-four million, seven hundred forty-eight thousand, four hundred forty-nine".