520148409 has 8 divisors (see below), whose sum is σ = 756579552. Its totient is φ = 315241440.

The previous prime is 520148401. The next prime is 520148423. The reversal of 520148409 is 904841025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520148409 - 2³ = 520148401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 15762073 = 520148409 / (5 + 2 + 0 + 1 + 4 + 8 + 4 + 0 + 9).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 520148409.

It is not an unprimeable number, because it can be changed into a prime (520148401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7881004 + ... + 7881069.

It is an arithmetic number, because the mean of its divisors is an integer number (94572444).

Almost surely, 2^520148409 is an apocalyptic number.

It is an amenable number.

520148409 is a deficient number, since it is larger than the sum of its proper divisors (236431143).

520148409 is a wasteful number, since it uses less digits than its factorization.

520148409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15762087.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 520148409 is about 22806.7623524252. The cubic root of 520148409 is about 804.2216459653.

The spelling of 520148409 in words is "five hundred twenty million, one hundred forty-eight thousand, four hundred nine".