145083209 has 2 divisors, whose sum is σ = 145083210. Its totient is φ = 145083208.

The previous prime is 145083181. The next prime is 145083233. The reversal of 145083209 is 902380541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129504400 + 15578809 = 11380^2 + 3947^2 .

It is a cyclic number.

It is not a de Polignac number, because 145083209 - 2¹² = 145079113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145083709) 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, 72541604 + 72541605.

It is an arithmetic number, because the mean of its divisors is an integer number (72541605).

Almost surely, 2^145083209 is an apocalyptic number.

It is an amenable number.

145083209 is a deficient number, since it is larger than the sum of its proper divisors (1).

145083209 is an equidigital number, since it uses as much as digits as its factorization.

145083209 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 32.

The square root of 145083209 is about 12045.0491489242. The cubic root of 145083209 is about 525.4592613184.

The spelling of 145083209 in words is "one hundred forty-five million, eighty-three thousand, two hundred nine".