45023993 has 6 divisors (see below), whose sum is σ = 52374906. Its totient is φ = 38591952.

The previous prime is 45023983. The next prime is 45023999. The reversal of 45023993 is 39932054.

It can be written as a sum of positive squares in only one way, i.e., 34245904 + 10778089 = 5852^2 + 3283^2 .

It is not a de Polignac number, because 45023993 - 2⁶ = 45023929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45023999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459380 + ... + 459477.

It is an arithmetic number, because the mean of its divisors is an integer number (8729151).

Almost surely, 2^45023993 is an apocalyptic number.

It is an amenable number.

45023993 is a deficient number, since it is larger than the sum of its proper divisors (7350913).

45023993 is an equidigital number, since it uses as much as digits as its factorization.

45023993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918871 (or 918864 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 45023993 is about 6709.9920268209. The cubic root of 45023993 is about 355.7525344329.

The spelling of 45023993 in words is "forty-five million, twenty-three thousand, nine hundred ninety-three".