45509647 has 4 divisors (see below), whose sum is σ = 46058040. Its totient is φ = 44961256.

The previous prime is 45509627. The next prime is 45509657. The reversal of 45509647 is 74690554.

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 45509647 - 2¹¹ = 45507599 is a prime.

It is a super-2 number, since 2×45509647² = 4142255940129218, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45509627) 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, 274072 + ... + 274237.

It is an arithmetic number, because the mean of its divisors is an integer number (11514510).

Almost surely, 2^45509647 is an apocalyptic number.

45509647 is a deficient number, since it is larger than the sum of its proper divisors (548393).

45509647 is an equidigital number, since it uses as much as digits as its factorization.

45509647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548392.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 45509647 is about 6746.0838269325. The cubic root of 45509647 is about 357.0270780592.

The spelling of 45509647 in words is "forty-five million, five hundred nine thousand, six hundred forty-seven".