45452809 has 4 divisors (see below), whose sum is σ = 45715716. Its totient is φ = 45189904.

The previous prime is 45452801. The next prime is 45452819. The reversal of 45452809 is 90825454.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20502784 + 24950025 = 4528^2 + 4995^2 .

It is a cyclic number.

It is not a de Polignac number, because 45452809 - 2³ = 45452801 is a prime.

It is a super-3 number, since 3×45452809³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45452801) 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, 131194 + ... + 131539.

It is an arithmetic number, because the mean of its divisors is an integer number (11428929).

Almost surely, 2^45452809 is an apocalyptic number.

It is an amenable number.

45452809 is a deficient number, since it is larger than the sum of its proper divisors (262907).

45452809 is a wasteful number, since it uses less digits than its factorization.

45452809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262906.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 45452809 is about 6741.8698444868. The cubic root of 45452809 is about 356.8783831467.

The spelling of 45452809 in words is "forty-five million, four hundred fifty-two thousand, eight hundred nine".