45131729 has 4 divisors (see below), whose sum is σ = 45164784. Its totient is φ = 45098676.

The previous prime is 45131717. The next prime is 45131731. The reversal of 45131729 is 92713154.

45131729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45131729 - 2⁸ = 45131473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45131695 and 45131704.

It is not an unprimeable number, because it can be changed into a prime (45131759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14387 + ... + 17240.

It is an arithmetic number, because the mean of its divisors is an integer number (11291196).

Almost surely, 2^45131729 is an apocalyptic number.

It is an amenable number.

45131729 is a deficient number, since it is larger than the sum of its proper divisors (33055).

45131729 is a wasteful number, since it uses less digits than its factorization.

45131729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33054.

The product of its digits is 7560, while the sum is 32.

The square root of 45131729 is about 6718.0152574998. The cubic root of 45131729 is about 356.0360634467.

The spelling of 45131729 in words is "forty-five million, one hundred thirty-one thousand, seven hundred twenty-nine".