45085109 has 4 divisors (see below), whose sum is σ = 45334380. Its totient is φ = 44835840.

The previous prime is 45085069. The next prime is 45085121. The reversal of 45085109 is 90158054.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 902500 + 44182609 = 950^2 + 6647^2 .

It is a cyclic number.

It is not a de Polignac number, because 45085109 - 2²⁴ = 28307893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45085189) 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 in 3 ways as a sum of consecutive naturals, for example, 124364 + ... + 124725.

It is an arithmetic number, because the mean of its divisors is an integer number (11333595).

Almost surely, 2^45085109 is an apocalyptic number.

It is an amenable number.

45085109 is a deficient number, since it is larger than the sum of its proper divisors (249271).

45085109 is a wasteful number, since it uses less digits than its factorization.

45085109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249270.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 45085109 is about 6714.5445861950. The cubic root of 45085109 is about 355.9134289559.

The spelling of 45085109 in words is "forty-five million, eighty-five thousand, one hundred nine".