145607489 has 2 divisors, whose sum is σ = 145607490. Its totient is φ = 145607488.

The previous prime is 145607461. The next prime is 145607491. The reversal of 145607489 is 984706541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145564225 + 43264 = 12065^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 145607489 - 2⁸ = 145607233 is a prime.

Together with 145607491, 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 (141607489) 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, 72803744 + 72803745.

It is an arithmetic number, because the mean of its divisors is an integer number (72803745).

Almost surely, 2^145607489 is an apocalyptic number.

It is an amenable number.

145607489 is a deficient number, since it is larger than the sum of its proper divisors (1).

145607489 is an equidigital number, since it uses as much as digits as its factorization.

145607489 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 145607489 is about 12066.7928216241. The cubic root of 145607489 is about 526.0914424627.

The spelling of 145607489 in words is "one hundred forty-five million, six hundred seven thousand, four hundred eighty-nine".