505783147 has 4 divisors (see below), whose sum is σ = 514074736. Its totient is φ = 497491560.

The previous prime is 505783139. The next prime is 505783163. The reversal of 505783147 is 741387505.

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

It is a cyclic number.

It is not a de Polignac number, because 505783147 - 2³ = 505783139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505783127) 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, 4145703 + ... + 4145824.

It is an arithmetic number, because the mean of its divisors is an integer number (128518684).

Almost surely, 2^505783147 is an apocalyptic number.

505783147 is a deficient number, since it is larger than the sum of its proper divisors (8291589).

505783147 is an equidigital number, since it uses as much as digits as its factorization.

505783147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8291588.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 505783147 is about 22489.6230959970. The cubic root of 505783147 is about 796.7488612482.

The spelling of 505783147 in words is "five hundred five million, seven hundred eighty-three thousand, one hundred forty-seven".