145809583 has 2 divisors, whose sum is σ = 145809584. Its totient is φ = 145809582.

The previous prime is 145809569. The next prime is 145809611. The reversal of 145809583 is 385908541.

It is a weak prime.

It is an emirp because it is prime and its reverse (385908541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145809583 - 2²¹ = 143712431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145809383) 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, 72904791 + 72904792.

It is an arithmetic number, because the mean of its divisors is an integer number (72904792).

Almost surely, 2^145809583 is an apocalyptic number.

145809583 is a deficient number, since it is larger than the sum of its proper divisors (1).

145809583 is an equidigital number, since it uses as much as digits as its factorization.

145809583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 145809583 is about 12075.1638912273. The cubic root of 145809583 is about 526.3347238446.

The spelling of 145809583 in words is "one hundred forty-five million, eight hundred nine thousand, five hundred eighty-three".