45491909 has 8 divisors (see below), whose sum is σ = 48672480. Its totient is φ = 42390000.

The previous prime is 45491903. The next prime is 45491917. The reversal of 45491909 is 90919454.

It is a happy number.

45491909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45491909 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 (45491903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18467 + ... + 20784.

It is an arithmetic number, because the mean of its divisors is an integer number (6084060).

Almost surely, 2^45491909 is an apocalyptic number.

It is an amenable number.

45491909 is a deficient number, since it is larger than the sum of its proper divisors (3180571).

45491909 is a wasteful number, since it uses less digits than its factorization.

45491909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39331.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 45491909 is about 6744.7690101293. The cubic root of 45491909 is about 356.9806866551.

The spelling of 45491909 in words is "forty-five million, four hundred ninety-one thousand, nine hundred nine".