145135189 has 2 divisors, whose sum is σ = 145135190. Its totient is φ = 145135188.

The previous prime is 145135187. The next prime is 145135213. The reversal of 145135189 is 981531541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77616100 + 67519089 = 8810^2 + 8217^2 .

It is a cyclic number.

It is not a de Polignac number, because 145135189 - 2¹ = 145135187 is a prime.

Together with 145135187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145135187) 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, 72567594 + 72567595.

It is an arithmetic number, because the mean of its divisors is an integer number (72567595).

Almost surely, 2^145135189 is an apocalyptic number.

It is an amenable number.

145135189 is a deficient number, since it is larger than the sum of its proper divisors (1).

145135189 is an equidigital number, since it uses as much as digits as its factorization.

145135189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 37.

The square root of 145135189 is about 12047.2066886893. The cubic root of 145135189 is about 525.5220071760.

The spelling of 145135189 in words is "one hundred forty-five million, one hundred thirty-five thousand, one hundred eighty-nine".