45203309 has 2 divisors, whose sum is σ = 45203310. Its totient is φ = 45203308.

The previous prime is 45203273. The next prime is 45203311. The reversal of 45203309 is 90330254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44262409 + 940900 = 6653^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 45203309 - 2¹² = 45199213 is a prime.

Together with 45203311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45203339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22601654 + 22601655.

It is an arithmetic number, because the mean of its divisors is an integer number (22601655).

Almost surely, 2^45203309 is an apocalyptic number.

It is an amenable number.

45203309 is a deficient number, since it is larger than the sum of its proper divisors (1).

45203309 is an equidigital number, since it uses as much as digits as its factorization.

45203309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 45203309 is about 6723.3406131179. The cubic root of 45203309 is about 356.2241912564.

The spelling of 45203309 in words is "forty-five million, two hundred three thousand, three hundred nine".