45432509 has 2 divisors, whose sum is σ = 45432510. Its totient is φ = 45432508.

The previous prime is 45432493. The next prime is 45432523. The reversal of 45432509 is 90523454.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26265625 + 19166884 = 5125^2 + 4378^2 .

It is a cyclic number.

It is not a de Polignac number, because 45432509 - 2⁴ = 45432493 is a prime.

It is a super-3 number, since 3×45432509³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45432529) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22716254 + 22716255.

It is an arithmetic number, because the mean of its divisors is an integer number (22716255).

Almost surely, 2^45432509 is an apocalyptic number.

It is an amenable number.

45432509 is a deficient number, since it is larger than the sum of its proper divisors (1).

45432509 is an equidigital number, since it uses as much as digits as its factorization.

45432509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 45432509 is about 6740.3641593018. The cubic root of 45432509 is about 356.8252459103.

The spelling of 45432509 in words is "forty-five million, four hundred thirty-two thousand, five hundred nine".