147440905 has 4 divisors (see below), whose sum is σ = 176929092. Its totient is φ = 117952720.

The previous prime is 147440903. The next prime is 147440957. The reversal of 147440905 is 509044741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509044741 = 491 ⋅1036751.

It can be written as a sum of positive squares in 2 ways, for example, as 31899904 + 115541001 = 5648^2 + 10749^2 .

It is not a de Polignac number, because 147440905 - 2¹ = 147440903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147440903) 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, 14744086 + ... + 14744095.

It is an arithmetic number, because the mean of its divisors is an integer number (44232273).

Almost surely, 2^147440905 is an apocalyptic number.

It is an amenable number.

147440905 is a deficient number, since it is larger than the sum of its proper divisors (29488187).

147440905 is an equidigital number, since it uses as much as digits as its factorization.

147440905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29488186.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 147440905 is about 12142.5246551119. The cubic root of 147440905 is about 528.2903316501.

The spelling of 147440905 in words is "one hundred forty-seven million, four hundred forty thousand, nine hundred five".