45187909 has 16 divisors (see below), whose sum is σ = 51710400. Its totient is φ = 39142656.

The previous prime is 45187907. The next prime is 45187931. The reversal of 45187909 is 90978154.

It is a cyclic number.

It is not a de Polignac number, because 45187909 - 2¹ = 45187907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45187907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27102 + ... + 28720.

It is an arithmetic number, because the mean of its divisors is an integer number (3231900).

Almost surely, 2^45187909 is an apocalyptic number.

It is an amenable number.

45187909 is a deficient number, since it is larger than the sum of its proper divisors (6522491).

45187909 is a wasteful number, since it uses less digits than its factorization.

45187909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 45187909 is about 6722.1952515529. The cubic root of 45187909 is about 356.1837334834.

The spelling of 45187909 in words is "forty-five million, one hundred eighty-seven thousand, nine hundred nine".