145198489 has 2 divisors, whose sum is σ = 145198490. Its totient is φ = 145198488.

The previous prime is 145198477. The next prime is 145198499. The reversal of 145198489 is 984891541.

145198489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121110025 + 24088464 = 11005^2 + 4908^2 .

It is a cyclic number.

It is not a de Polignac number, because 145198489 - 2²¹ = 143101337 is a prime.

It is not a weakly prime, because it can be changed into another prime (145198409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72599244 + 72599245.

It is an arithmetic number, because the mean of its divisors is an integer number (72599245).

Almost surely, 2^145198489 is an apocalyptic number.

It is an amenable number.

145198489 is a deficient number, since it is larger than the sum of its proper divisors (1).

145198489 is an equidigital number, since it uses as much as digits as its factorization.

145198489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 49.

The square root of 145198489 is about 12049.8335673154. The cubic root of 145198489 is about 525.5983973523.

The spelling of 145198489 in words is "one hundred forty-five million, one hundred ninety-eight thousand, four hundred eighty-nine".