520214729 has 4 divisors (see below), whose sum is σ = 521573376. Its totient is φ = 518856084.

The previous prime is 520214719. The next prime is 520214743. The reversal of 520214729 is 927412025.

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-520214729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520214695 and 520214704.

It is not an unprimeable number, because it can be changed into a prime (520214719) 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, 678749 + ... + 679514.

It is an arithmetic number, because the mean of its divisors is an integer number (130393344).

Almost surely, 2^520214729 is an apocalyptic number.

It is an amenable number.

520214729 is a deficient number, since it is larger than the sum of its proper divisors (1358647).

520214729 is a wasteful number, since it uses less digits than its factorization.

520214729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358646.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 520214729 is about 22808.2162608127. The cubic root of 520214729 is about 804.2558244882.

The spelling of 520214729 in words is "five hundred twenty million, two hundred fourteen thousand, seven hundred twenty-nine".