45511909 has 4 divisors (see below), whose sum is σ = 45747916. Its totient is φ = 45275904.

The previous prime is 45511903. The next prime is 45511919. The reversal of 45511909 is 90911554.

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 4743684 + 40768225 = 2178^2 + 6385^2 .

It is a cyclic number.

It is not a de Polignac number, because 45511909 - 2⁵ = 45511877 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 (45511903) 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, 117714 + ... + 118099.

It is an arithmetic number, because the mean of its divisors is an integer number (11436979).

Almost surely, 2^45511909 is an apocalyptic number.

It is an amenable number.

45511909 is a deficient number, since it is larger than the sum of its proper divisors (236007).

45511909 is a wasteful number, since it uses less digits than its factorization.

45511909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236006.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 45511909 is about 6746.2514776726. The cubic root of 45511909 is about 357.0329931558.

The spelling of 45511909 in words is "forty-five million, five hundred eleven thousand, nine hundred nine".