45043309 has 4 divisors (see below), whose sum is σ = 45112320. Its totient is φ = 44974300.

The previous prime is 45043301. The next prime is 45043321. The reversal of 45043309 is 90334054.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90334054 = 2 ⋅45167027.

It is a cyclic number.

It is not a de Polignac number, because 45043309 - 2³ = 45043301 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 (45043301) 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, 33517 + ... + 34834.

It is an arithmetic number, because the mean of its divisors is an integer number (11278080).

Almost surely, 2^45043309 is an apocalyptic number.

It is an amenable number.

45043309 is a deficient number, since it is larger than the sum of its proper divisors (69011).

45043309 is an equidigital number, since it uses as much as digits as its factorization.

45043309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69010.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 45043309 is about 6711.4312184511. The cubic root of 45043309 is about 355.8034016339.

The spelling of 45043309 in words is "forty-five million, forty-three thousand, three hundred nine".