45308709 has 6 divisors (see below), whose sum is σ = 65445926. Its totient is φ = 30205800.

The previous prime is 45308651. The next prime is 45308737. The reversal of 45308709 is 90780354.

It can be written as a sum of positive squares in only one way, i.e., 42536484 + 2772225 = 6522^2 + 1665^2 .

It is not a de Polignac number, because 45308709 - 2¹¹ = 45306661 is a prime.

It is a super-2 number, since 2×45308709² = 4105758222493362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45308779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2517142 + ... + 2517159.

Almost surely, 2^45308709 is an apocalyptic number.

It is an amenable number.

45308709 is a deficient number, since it is larger than the sum of its proper divisors (20137217).

45308709 is a wasteful number, since it uses less digits than its factorization.

45308709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034307 (or 5034304 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 45308709 is about 6731.1744146174. The cubic root of 45308709 is about 356.5008442011.

The spelling of 45308709 in words is "forty-five million, three hundred eight thousand, seven hundred nine".