146345489 has 2 divisors, whose sum is σ = 146345490. Its totient is φ = 146345488.

The previous prime is 146345473. The next prime is 146345491. The reversal of 146345489 is 984543641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134560000 + 11785489 = 11600^2 + 3433^2 .

It is a cyclic number.

It is not a de Polignac number, because 146345489 - 2⁴ = 146345473 is a prime.

Together with 146345491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (146344489) 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, 73172744 + 73172745.

It is an arithmetic number, because the mean of its divisors is an integer number (73172745).

Almost surely, 2^146345489 is an apocalyptic number.

It is an amenable number.

146345489 is a deficient number, since it is larger than the sum of its proper divisors (1).

146345489 is an equidigital number, since it uses as much as digits as its factorization.

146345489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 44.

The square root of 146345489 is about 12097.3339624894. Note that the first 3 decimals coincide. The cubic root of 146345489 is about 526.9787626150.

The spelling of 146345489 in words is "one hundred forty-six million, three hundred forty-five thousand, four hundred eighty-nine".