147722005 has 4 divisors (see below), whose sum is σ = 177266412. Its totient is φ = 118177600.

The previous prime is 147721999. The next prime is 147722009. The reversal of 147722005 is 500227741.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25796241 + 121925764 = 5079^2 + 11042^2 .

It is not a de Polignac number, because 147722005 - 2²⁷ = 13504277 is a prime.

It is a super-2 number, since 2×147722005² = 43643581522440050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147722009) 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, 14772196 + ... + 14772205.

It is an arithmetic number, because the mean of its divisors is an integer number (44316603).

Almost surely, 2^147722005 is an apocalyptic number.

It is an amenable number.

147722005 is a deficient number, since it is larger than the sum of its proper divisors (29544407).

147722005 is an equidigital number, since it uses as much as digits as its factorization.

147722005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29544406.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 147722005 is about 12154.0941661647. The cubic root of 147722005 is about 528.6258516956.

Adding to 147722005 its reverse (500227741), we get a palindrome (647949746).

The spelling of 147722005 in words is "one hundred forty-seven million, seven hundred twenty-two thousand, five".