147445729 has 4 divisors (see below), whose sum is σ = 147728176. Its totient is φ = 147163284.

The previous prime is 147445693. The next prime is 147445733. The reversal of 147445729 is 927544741.

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: 927544741 = 2381 ⋅389561.

It is a cyclic number.

It is not a de Polignac number, because 147445729 - 2¹⁵ = 147412961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147445769) 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, 140439 + ... + 141484.

It is an arithmetic number, because the mean of its divisors is an integer number (36932044).

Almost surely, 2^147445729 is an apocalyptic number.

It is an amenable number.

147445729 is a deficient number, since it is larger than the sum of its proper divisors (282447).

147445729 is an equidigital number, since it uses as much as digits as its factorization.

147445729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282446.

The product of its digits is 282240, while the sum is 43.

The square root of 147445729 is about 12142.7232942203. The cubic root of 147445729 is about 528.2960931557.

The spelling of 147445729 in words is "one hundred forty-seven million, four hundred forty-five thousand, seven hundred twenty-nine".