145205773 has 2 divisors, whose sum is σ = 145205774. Its totient is φ = 145205772.

The previous prime is 145205747. The next prime is 145205777. The reversal of 145205773 is 377502541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115197289 + 30008484 = 10733^2 + 5478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145205773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145205777) 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, 72602886 + 72602887.

It is an arithmetic number, because the mean of its divisors is an integer number (72602887).

Almost surely, 2^145205773 is an apocalyptic number.

It is an amenable number.

145205773 is a deficient number, since it is larger than the sum of its proper divisors (1).

145205773 is an equidigital number, since it uses as much as digits as its factorization.

145205773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 145205773 is about 12050.1358083633. The cubic root of 145205773 is about 525.6071862287.

The spelling of 145205773 in words is "one hundred forty-five million, two hundred five thousand, seven hundred seventy-three".