45009361 has 4 divisors (see below), whose sum is σ = 45022900. Its totient is φ = 44995824.

The previous prime is 45009329. The next prime is 45009379. The reversal of 45009361 is 16390054.

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 24443136 + 20566225 = 4944^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 45009361 - 2⁵ = 45009329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45009311) 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, 2035 + ... + 9703.

It is an arithmetic number, because the mean of its divisors is an integer number (11255725).

Almost surely, 2^45009361 is an apocalyptic number.

It is an amenable number.

45009361 is a deficient number, since it is larger than the sum of its proper divisors (13539).

45009361 is an equidigital number, since it uses as much as digits as its factorization.

45009361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13538.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 45009361 is about 6708.9016239620. The cubic root of 45009361 is about 355.7139925006.

It can be divided in two parts, 4500 and 9361, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 45009361 in words is "forty-five million, nine thousand, three hundred sixty-one".