45723509 has 4 divisors (see below), whose sum is σ = 49240716. Its totient is φ = 42206304.

The previous prime is 45723473. The next prime is 45723511. The reversal of 45723509 is 90532754.

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 4635409 + 41088100 = 2153^2 + 6410^2 .

It is a cyclic number.

It is not a de Polignac number, because 45723509 - 2¹² = 45719413 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 (45723539) 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, 1758584 + ... + 1758609.

It is an arithmetic number, because the mean of its divisors is an integer number (12310179).

Almost surely, 2^45723509 is an apocalyptic number.

It is an amenable number.

45723509 is a deficient number, since it is larger than the sum of its proper divisors (3517207).

45723509 is a wasteful number, since it uses less digits than its factorization.

45723509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517206.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 45723509 is about 6761.9160746049. The cubic root of 45723509 is about 357.5854595440.

The spelling of 45723509 in words is "forty-five million, seven hundred twenty-three thousand, five hundred nine".