45439189 has 4 divisors (see below), whose sum is σ = 45744300. Its totient is φ = 45134080.

The previous prime is 45439183. The next prime is 45439213. The reversal of 45439189 is 98193454.

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 22800625 + 22638564 = 4775^2 + 4758^2 .

It is a cyclic number.

It is not a de Polignac number, because 45439189 - 2⁹ = 45438677 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 (45439183) 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, 152332 + ... + 152629.

It is an arithmetic number, because the mean of its divisors is an integer number (11436075).

Almost surely, 2^45439189 is an apocalyptic number.

It is an amenable number.

45439189 is a deficient number, since it is larger than the sum of its proper divisors (305111).

45439189 is a wasteful number, since it uses less digits than its factorization.

45439189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305110.

The product of its digits is 155520, while the sum is 43.

The square root of 45439189 is about 6740.8596632774. The cubic root of 45439189 is about 356.8427332110.

The spelling of 45439189 in words is "forty-five million, four hundred thirty-nine thousand, one hundred eighty-nine".