45023809 has 2 divisors, whose sum is σ = 45023810. Its totient is φ = 45023808.

The previous prime is 45023801. The next prime is 45023831. The reversal of 45023809 is 90832054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32171584 + 12852225 = 5672^2 + 3585^2 .

It is a cyclic number.

It is not a de Polignac number, because 45023809 - 2³ = 45023801 is a prime.

It is not a weakly prime, because it can be changed into another prime (45023801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22511904 + 22511905.

It is an arithmetic number, because the mean of its divisors is an integer number (22511905).

Almost surely, 2^45023809 is an apocalyptic number.

It is an amenable number.

45023809 is a deficient number, since it is larger than the sum of its proper divisors (1).

45023809 is an equidigital number, since it uses as much as digits as its factorization.

45023809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 45023809 is about 6709.9783159113. The cubic root of 45023809 is about 355.7520498131.

The spelling of 45023809 in words is "forty-five million, twenty-three thousand, eight hundred nine".