145670489 has 2 divisors, whose sum is σ = 145670490. Its totient is φ = 145670488.

The previous prime is 145670479. The next prime is 145670563. The reversal of 145670489 is 984076541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86118400 + 59552089 = 9280^2 + 7717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145670489 is a prime.

It is a super-3 number, since 3×145670489³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145670479) 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, 72835244 + 72835245.

It is an arithmetic number, because the mean of its divisors is an integer number (72835245).

Almost surely, 2^145670489 is an apocalyptic number.

It is an amenable number.

145670489 is a deficient number, since it is larger than the sum of its proper divisors (1).

145670489 is an equidigital number, since it uses as much as digits as its factorization.

145670489 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 145670489 is about 12069.4030092627. The cubic root of 145670489 is about 526.1673061932.

The spelling of 145670489 in words is "one hundred forty-five million, six hundred seventy thousand, four hundred eighty-nine".