45309439 has 4 divisors (see below), whose sum is σ = 51782224. Its totient is φ = 38836656.

The previous prime is 45309389. The next prime is 45309443. The reversal of 45309439 is 93490354.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45309439 - 2¹⁹ = 44785151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45309398 and 45309407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45309499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3236382 + ... + 3236395.

It is an arithmetic number, because the mean of its divisors is an integer number (12945556).

Almost surely, 2^45309439 is an apocalyptic number.

45309439 is a deficient number, since it is larger than the sum of its proper divisors (6472785).

45309439 is an equidigital number, since it uses as much as digits as its factorization.

45309439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6472784.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 45309439 is about 6731.2286397061. The cubic root of 45309439 is about 356.5027588015.

The spelling of 45309439 in words is "forty-five million, three hundred nine thousand, four hundred thirty-nine".