145944289 has 2 divisors, whose sum is σ = 145944290. Its totient is φ = 145944288.

The previous prime is 145944287. The next prime is 145944313. The reversal of 145944289 is 982449541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119246400 + 26697889 = 10920^2 + 5167^2 .

It is a cyclic number.

It is not a de Polignac number, because 145944289 - 2¹ = 145944287 is a prime.

Together with 145944287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (145944283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72972144 + 72972145.

It is an arithmetic number, because the mean of its divisors is an integer number (72972145).

Almost surely, 2^145944289 is an apocalyptic number.

It is an amenable number.

145944289 is a deficient number, since it is larger than the sum of its proper divisors (1).

145944289 is an equidigital number, since it uses as much as digits as its factorization.

145944289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 46.

The square root of 145944289 is about 12080.7404160507. The cubic root of 145944289 is about 526.4967585140.

The spelling of 145944289 in words is "one hundred forty-five million, nine hundred forty-four thousand, two hundred eighty-nine".