147471809 has 4 divisors (see below), whose sum is σ = 148597680. Its totient is φ = 146345940.

The previous prime is 147471803. The next prime is 147471829. The reversal of 147471809 is 908174741.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147471809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147471803) 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, 562739 + ... + 563000.

It is an arithmetic number, because the mean of its divisors is an integer number (37149420).

Almost surely, 2^147471809 is an apocalyptic number.

It is an amenable number.

147471809 is a deficient number, since it is larger than the sum of its proper divisors (1125871).

147471809 is a wasteful number, since it uses less digits than its factorization.

147471809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125870.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 147471809 is about 12143.7971409275. The cubic root of 147471809 is about 528.3272394175.

The spelling of 147471809 in words is "one hundred forty-seven million, four hundred seventy-one thousand, eight hundred nine".