45351809 has 2 divisors, whose sum is σ = 45351810. Its totient is φ = 45351808.

The previous prime is 45351769. The next prime is 45351811. The reversal of 45351809 is 90815354.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35760400 + 9591409 = 5980^2 + 3097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45351809 is a prime.

Together with 45351811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45351829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22675904 + 22675905.

It is an arithmetic number, because the mean of its divisors is an integer number (22675905).

Almost surely, 2^45351809 is an apocalyptic number.

It is an amenable number.

45351809 is a deficient number, since it is larger than the sum of its proper divisors (1).

45351809 is an equidigital number, since it uses as much as digits as its factorization.

45351809 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 35.

The square root of 45351809 is about 6734.3751751740. The cubic root of 45351809 is about 356.6138490901.

The spelling of 45351809 in words is "forty-five million, three hundred fifty-one thousand, eight hundred nine".