45731787 has 4 divisors (see below), whose sum is σ = 60975720. Its totient is φ = 30487856.

The previous prime is 45731779. The next prime is 45731801. The reversal of 45731787 is 78713754.

It is a happy number.

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 45731787 - 2³ = 45731779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45731737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7621962 + ... + 7621967.

It is an arithmetic number, because the mean of its divisors is an integer number (15243930).

Almost surely, 2^45731787 is an apocalyptic number.

45731787 is a deficient number, since it is larger than the sum of its proper divisors (15243933).

45731787 is a wasteful number, since it uses less digits than its factorization.

45731787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15243932.

The product of its digits is 164640, while the sum is 42.

The square root of 45731787 is about 6762.5281515126. The cubic root of 45731787 is about 357.6070378953.

The spelling of 45731787 in words is "forty-five million, seven hundred thirty-one thousand, seven hundred eighty-seven".