45715309 has 4 divisors (see below), whose sum is σ = 46577916. Its totient is φ = 44852704.

The previous prime is 45715247. The next prime is 45715337. The reversal of 45715309 is 90351754.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90351754 = 2 ⋅45175877.

It can be written as a sum of positive squares in 2 ways, for example, as 41242084 + 4473225 = 6422^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 45715309 - 2¹⁵ = 45682541 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 (45716309) 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, 431224 + ... + 431329.

It is an arithmetic number, because the mean of its divisors is an integer number (11644479).

Almost surely, 2^45715309 is an apocalyptic number.

It is an amenable number.

45715309 is a deficient number, since it is larger than the sum of its proper divisors (862607).

45715309 is an equidigital number, since it uses as much as digits as its factorization.

45715309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862606.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 45715309 is about 6761.3097104037. The cubic root of 45715309 is about 357.5640819483.

The spelling of 45715309 in words is "forty-five million, seven hundred fifteen thousand, three hundred nine".