154442149 has 2 divisors, whose sum is σ = 154442150. Its totient is φ = 154442148.

The previous prime is 154442147. The next prime is 154442153. The reversal of 154442149 is 941244451.

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., 139948900 + 14493249 = 11830^2 + 3807^2 .

It is a cyclic number.

It is not a de Polignac number, because 154442149 - 2¹ = 154442147 is a prime.

Together with 154442147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154442147) 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, 77221074 + 77221075.

It is an arithmetic number, because the mean of its divisors is an integer number (77221075).

Almost surely, 2^154442149 is an apocalyptic number.

It is an amenable number.

154442149 is a deficient number, since it is larger than the sum of its proper divisors (1).

154442149 is an equidigital number, since it uses as much as digits as its factorization.

154442149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 34.

The square root of 154442149 is about 12427.4755682721. The cubic root of 154442149 is about 536.5233307177.

The spelling of 154442149 in words is "one hundred fifty-four million, four hundred forty-two thousand, one hundred forty-nine".