45174509 has 4 divisors (see below), whose sum is σ = 45196704. Its totient is φ = 45152316.

The previous prime is 45174499. The next prime is 45174511. The reversal of 45174509 is 90547154.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90547154 = 2 ⋅45273577.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45174509 is a prime.

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 (45174109) 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, 7697 + ... + 12230.

It is an arithmetic number, because the mean of its divisors is an integer number (11299176).

Almost surely, 2^45174509 is an apocalyptic number.

It is an amenable number.

45174509 is a deficient number, since it is larger than the sum of its proper divisors (22195).

45174509 is a wasteful number, since it uses less digits than its factorization.

45174509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22194.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 45174509 is about 6721.1984794380. The cubic root of 45174509 is about 356.1485224871.

The spelling of 45174509 in words is "forty-five million, one hundred seventy-four thousand, five hundred nine".