45045709 has 4 divisors (see below), whose sum is σ = 45059580. Its totient is φ = 45031840.

The previous prime is 45045703. The next prime is 45045719. The reversal of 45045709 is 90754054.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 36360900 + 8684809 = 6030^2 + 2947^2 .

It is a cyclic number.

It is not a de Polignac number, because 45045709 - 2³ = 45045701 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 (45045701) 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, 849 + ... + 9529.

It is an arithmetic number, because the mean of its divisors is an integer number (11264895).

Almost surely, 2^45045709 is an apocalyptic number.

It is an amenable number.

45045709 is a deficient number, since it is larger than the sum of its proper divisors (13871).

45045709 is an equidigital number, since it uses as much as digits as its factorization.

45045709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13870.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 45045709 is about 6711.6100154881. The cubic root of 45045709 is about 355.8097208336.

It can be divided in two parts, 45045 and 709, that added together give a palindrome (45754).

The spelling of 45045709 in words is "forty-five million, forty-five thousand, seven hundred nine".