45229729 has 4 divisors (see below), whose sum is σ = 45507376. Its totient is φ = 44952084.

The previous prime is 45229703. The next prime is 45229739. The reversal of 45229729 is 92792254.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92792254 = 2 ⋅46396127.

It is a cyclic number.

It is not a de Polignac number, because 45229729 - 2⁵ = 45229697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45229691 and 45229700.

It is not an unprimeable number, because it can be changed into a prime (45229739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138579 + ... + 138904.

It is an arithmetic number, because the mean of its divisors is an integer number (11376844).

Almost surely, 2^45229729 is an apocalyptic number.

It is an amenable number.

45229729 is a deficient number, since it is larger than the sum of its proper divisors (277647).

45229729 is a wasteful number, since it uses less digits than its factorization.

45229729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277646.

The product of its digits is 90720, while the sum is 40.

The square root of 45229729 is about 6725.3051231896. The cubic root of 45229729 is about 356.2935785820.

The spelling of 45229729 in words is "forty-five million, two hundred twenty-nine thousand, seven hundred twenty-nine".