45207309 has 8 divisors (see below), whose sum is σ = 68887360. Its totient is φ = 25832736.

The previous prime is 45207241. The next prime is 45207311. The reversal of 45207309 is 90370254.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45207309 - 2⁷ = 45207181 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 (45207329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076344 + ... + 1076385.

It is an arithmetic number, because the mean of its divisors is an integer number (8610920).

Almost surely, 2^45207309 is an apocalyptic number.

It is an amenable number.

45207309 is a deficient number, since it is larger than the sum of its proper divisors (23680051).

45207309 is a wasteful number, since it uses less digits than its factorization.

45207309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152739.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 45207309 is about 6723.6380777076. The cubic root of 45207309 is about 356.2346982655.

The spelling of 45207309 in words is "forty-five million, two hundred seven thousand, three hundred nine".