45357509 has 4 divisors (see below), whose sum is σ = 45592716. Its totient is φ = 45122304.

The previous prime is 45357497. The next prime is 45357517. The reversal of 45357509 is 90575354.

It is a happy number.

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 13468900 + 31888609 = 3670^2 + 5647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45357509 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 (45357539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117314 + ... + 117699.

It is an arithmetic number, because the mean of its divisors is an integer number (11398179).

Almost surely, 2^45357509 is an apocalyptic number.

It is an amenable number.

45357509 is a deficient number, since it is larger than the sum of its proper divisors (235207).

45357509 is a wasteful number, since it uses less digits than its factorization.

45357509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235206.

The product of its (nonzero) digits is 94500, while the sum is 38.

The square root of 45357509 is about 6734.7983637226. The cubic root of 45357509 is about 356.6287886911.

The spelling of 45357509 in words is "forty-five million, three hundred fifty-seven thousand, five hundred nine".