145618009 has 2 divisors, whose sum is σ = 145618010. Its totient is φ = 145618008.

The previous prime is 145617949. The next prime is 145618013. The reversal of 145618009 is 900816541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143928009 + 1690000 = 11997^2 + 1300^2 .

It is a cyclic number.

It is not a de Polignac number, because 145618009 - 2¹¹ = 145615961 is a prime.

It is not a weakly prime, because it can be changed into another prime (145612009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72809004 + 72809005.

It is an arithmetic number, because the mean of its divisors is an integer number (72809005).

Almost surely, 2^145618009 is an apocalyptic number.

It is an amenable number.

145618009 is a deficient number, since it is larger than the sum of its proper divisors (1).

145618009 is an equidigital number, since it uses as much as digits as its factorization.

145618009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 145618009 is about 12067.2287207958. The cubic root of 145618009 is about 526.1041120233.

The spelling of 145618009 in words is "one hundred forty-five million, six hundred eighteen thousand, nine".