147470809 has 4 divisors (see below), whose sum is σ = 151067700. Its totient is φ = 143873920.

The previous prime is 147470803. The next prime is 147470849. The reversal of 147470809 is 908074741.

147470809 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.

It can be written as a sum of positive squares in 2 ways, for example, as 38477209 + 108993600 = 6203^2 + 10440^2 .

It is not a de Polignac number, because 147470809 - 2⁷ = 147470681 is a prime.

It is a super-2 number, since 2×147470809² = 43495279014228962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147470803) 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, 1798384 + ... + 1798465.

It is an arithmetic number, because the mean of its divisors is an integer number (37766925).

Almost surely, 2^147470809 is an apocalyptic number.

It is an amenable number.

147470809 is a deficient number, since it is larger than the sum of its proper divisors (3596891).

147470809 is an equidigital number, since it uses as much as digits as its factorization.

147470809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3596890.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 147470809 is about 12143.7559675744. The cubic root of 147470809 is about 528.3260452267.

The spelling of 147470809 in words is "one hundred forty-seven million, four hundred seventy thousand, eight hundred nine".