145076489 has 2 divisors, whose sum is σ = 145076490. Its totient is φ = 145076488.

The previous prime is 145076471. The next prime is 145076537. The reversal of 145076489 is 984670541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114661264 + 30415225 = 10708^2 + 5515^2 .

It is an emirp because it is prime and its reverse (984670541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145076489 - 2⁸ = 145076233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145076429) 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, 72538244 + 72538245.

It is an arithmetic number, because the mean of its divisors is an integer number (72538245).

Almost surely, 2^145076489 is an apocalyptic number.

It is an amenable number.

145076489 is a deficient number, since it is larger than the sum of its proper divisors (1).

145076489 is an equidigital number, since it uses as much as digits as its factorization.

145076489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 145076489 is about 12044.7701929095. The cubic root of 145076489 is about 525.4511484090.

The spelling of 145076489 in words is "one hundred forty-five million, seventy-six thousand, four hundred eighty-nine".